The All-New BMW 4 Series Convertible
The newest top-down Ultimate Driving Machine
Woodcliff Lake, NJ October 12, 2013 6:00pm EDT/3:00pm PDT... The
all-new BMW 4 Series Convertible represents the latest chapter in the
modern history of BMW Convertibles which dates back to 1987 and the
first BMW 3 Series Convertible. As with the new BMW 4 Series Coupe,
the 4 Series Convertible embodies the very essence of dynamics and
aesthetic appeal in the premium segment. The "4" in its
title headlines this new product line for the Convertible and
emphasizes not only its stand-out design, but also the fact that any
way you look at it, the new 4 Series Convertible represents something
more than its BMW 3 Series cousins 3+1, if you will. The 2014 BMW 4
Series Convertible will again feature a three-piece retractable
hardtop with new features and functionality.
The new BMW 4 Series Convertible will be offered in the US as both a
428i, featuring BMW's award-winning TwinPower Turbo 2.0-liter
4-cylinder and as a 435i with the multi- award winning TwinPower Turbo
3.0-liter inline six. Both will feature a standard 8-speed sport
automatic transmission. The 428i Convertible will be offered with a
choice of rear- wheel drive or with optional xDrive, BMW's intelligent
all-wheel drive system, while the 435i Convertible will be available
at launch with rear wheel drive. The 2014 BMW 428i Convertible will
have a base MSRP of $49,675, and the 2014 BMW 435i Convertible will
have a starting price of $55,825. Both prices include $925 destination
and handling. The 2014 BMW 4 Series Convertible will arrive in US
showrooms in the first quarter of 2014.
The new BMW 4 Series Convertible is visibly larger in width and
wheelbase than the outgoing BMW 3 Series Convertible, and its
stretched silhouette sits considerably lower to the road. This,
together with its BMW-typical short overhangs, long hood and set-back
passenger compartment with flowing roofline, give the BMW 4 Series
Convertible a visual balance. The car's striking front end with its
characteristic BMW design features, such as the double-kidney grille,
four round headlights and a large air intake in the front apron is
keen to display its family ties with the BMW 3 Series. New elements of
the BMW 4 Series Convertible are the Air Breathers, which are
positioned rearwards of the front wheel arches to reduce drag. The
Convertible's muscular wheel arches and wide track give an aggressive
stance, with its prominent horizontal lines.
Improved roof design and construction. Extra comfort. More
The design language of the new BMW 4 Series Convertible is reflected
in the car's unmistakable and elegant silhouette with balanced
proportions when the top is down, and in the coupe-like profile of the
roofline without a B-pillar when the hardtop is up. The three-
piece retractable hardtop is distinguished by advanced soundproofing
with its "noise- absorbing" headliner, ensuring quietness
and passenger comfort under all weather conditions even in winter.
The interior roof is fully lined and features integrated lights that
add to the ambience expected of a premium sport coupe. When the top is
down and stored in the trunk, the standard load and unload assistance
function moves the folded roof and the trunklid upwards to provide
ample storage space and easy access. Even large and bulky items, like
luggage or golf clubs, can be conveniently stowed when the top is
down. The sound-absorbing headliner also reduces wind noise by up to 2
dB in comparison to its predecessor.
Individual equipment lines and exclusive details.
The interior of the BMW Series 4 Convertible presents a stylish fusion
of sporty allure, elegance and exclusivity. All of the controls are
arranged ergonomically around the driver to provide optimum access to
all functions. The doors are designed so that all the lines converge
towards the rear, and bright color combinations featuring a two-tone
effect for the door and side panels, in combination with the hardtop
cover, contribute to the "boat deck" look. This wrap-around
interior design provides a cabin that allows all passengers to share
the open-sky driving experience. The design of the stand electrically
adjustable seats is new and, again, includes integrated seatbelts. If
desired, the standard seats and the optional sport seats with recessed
head restraints can be equipped with neck warmers for the driver and
front passenger for the first time, as part of the available Cold
Weather Package. When the top is down, the temperature setting is
automatically controlled in relation to the outdoor temperature and
the speed of the vehicle. In addition to the standard model, two
specially equipped lines and M Sport are available in the US. The
Sport Line and Luxury Line versions can be selected to personalize the
new convertible with special interior and exterior accents. The fine
materials and meticulous craftsmanship underline the premium ambience
of the BMW 4 Series Convertible.
Sharp driving dynamics befitting The Ultimate Driving MachineTM
The defining characteristics of the new BMW 4 Series Convertible are
its driving dynamics and aesthetics. As always, BMW engineers have
placed special focus on steering accuracy, precision, linear control
response, and agility to fortify the new BMW 4 Series Convertible as
the latest shape of The Ultimate Driving Machine. Sophisticated
chassis technology, near- perfect 50:50 weight distribution,
fine-tuning in the wind tunnel, and lightweight construction all
contribute to meet that goal.
The all-new BMW 4 Series Convertible has a longer wheelbase, wider
track and lower ride height than the previous-generation BMW 3 Series
Convertible. Its lower suspension brings down the car's center of
gravity. As a result, the new BMW 4 Series Convertible is inherently
one of the sportiest open cars on the road.
BMW EfficientDynamics A holistic philosophy.
In addition to its sporty driving dynamics, the new BMW 4 Series
Convertible offers outstanding fuel efficiency. This is a result of
the BMW EfficientDynamics development strategy, which can be found in
almost every aspect of the new model. The car's lightweight
construction and aerodynamic features headlined by the
groundbreaking Air Curtains and Air Breathers also help to maximize
efficiency. At its core, the new BMW 4 Series Convertible has been
engineered for performance excellence, while other features including
Auto Start-Stop and on-demand operation of ancillary units help lower
fuel consumption and emissions as well. Use of ECO PRO mode gives the
potential to cut fuel use by as much as 20 percent.
The new BMW 4 Series Convertible uses a combination of driver
assistance systems and mobility services (available as standard or
optional under the BMW ConnectedDrive banner) to increase safety,
comfort and convenience of access to infotainment features. Among the
optional highlights are a new generation of BMW Navigation System,
which offers extra capability, sharper graphics and 3D elements for
the map display, the full-color BMW Head-Up Display; Active Driving
Assistant, which warns the driver of a potential collision with a
pedestrian, the intelligent; LED High Beam Assistant and the latest
iteration of BMW Active Cruise Control with Stop & Go. As far as
infotainment is concerned, efficient interface technology enables the
integration of smartphones and numerous Bluetooth office functions.
The latter also offers the driver the option of a dictation function
with full speech recognition. Each feature has been carefully
integrated to minimize driver distraction while the vehicle is in
Design: Aesthetic appeal blends with individuality and sporty
The new BMW 4 Series Convertible represents the fifth generation in
the heritage of modern BMW convertibles. Just like the BMW 4 Series
Coupe, the new BMW 4 Series Convertible introduces new dimensions of
aesthetic design and sportiness. At the same time, the new model
reinforces the company's claim to years of market leadership when it
comes to designing and building premium convertibles for the mid-size
segment. More than ever before, it is the design language of the BMW 4
Series Convertible that accounts for its eye-catching and powerful
presence on the road. The synergy of dynamic performance with maximum
driving pleasure is another milestone in the story begun by the BMW 4
Series Coupe and now being continued with the launch of the BMW 4
Athletic elegance, impeccable proportions.
The proportions of the new BMW 4 Series Convertible differ
significantly from those of the outgoing BMW 3 Series Convertible.
Although only an inch (26 mm) has been added to the car's length
(182.6 in / 4,638 mm), a 2-inch (50-mm) longer wheelbase (110.6 in /
2,810 mm) enhances the stretched Convertible's profile. These
dimensions combined with the BMW 4 Series Convertible's
characteristically short overhangs, long hood and set-back passenger
compartment produce a visually balanced silhouette. The athletic
appearance of the BMW 4 Series Convertible is particularly emphasized
by its 1.7inch (43-mm) increase in the width (71.9 in / 1,825 mm).
Notably, the rear wheel arches mark the car's broadest point, giving a
more aggressive stance. As a result, 1.8-inch-(45-mm) wider front
track (60.8 in /
1,545 mm) and full 3.1 inches (81 mm) of extra width
at the rear axle (62.7 in / 1,593 mm) promise even at a standstill
further improvements in sporty characteristics for which BMW is
Eye-catching front end with prominently sporty contours.
Signature BMW front-end design features, such as the double-kidney
grille and four round headlights, undoubtedly identify the 4 Series
Convertible as a BMW. It is unmistakably the 3 Series' sibling,
although the differences are apparent. The optional eye-catching
full-LED headlights, with their hexagonal design, and the slightly
forward-slanting BMW kidney grille form a single unit and strengthen
the athletic presence of the BMW 4 Series Convertible on the road.
Below the headlight line, the BMW 4 Series Convertible features a
large air intake in the front apron. On the far left and right-hand
edges of the air intakes are the additional small vertical apertures
for the Air Curtains. These vents improve the airflow around the
outside of the front wheels and help cut fuel consumption at higher
Flowing lines shape the elegantly sporty silhouette.
Powerfully taut surfaces and precise, sweeping lines define the
athletic outline of the BMW 4 Series Convertible. The sloping roofline
stretches the car's overall appearance and elegantly accentuates the
sporting profile of the flanks. The molding at the juncture of the
three-piece folding hardtop and the body is an eye-catching touch. It
is available in chrome, black or brushed aluminum, depending on the
model variant. Additionally, the shallow, homogeneous side window
graphic with the signature BMW Hofmeister kink at the trailing edge of
the C-pillar generates dynamic visual tension. Below the windows, the
double swage line inherited from the BMW 3 Series teams up with the
striking door sill line to strengthen the body's dynamic wedge shape.
The car exudes dynamic elegance when the top is down, and the smooth,
flowing look of the silhouette is in no way compromised by radio
antennas or the roll bars, which are intelligently hidden behind the
rear head restraints. Located just rearwards of the BMW 4 Series
Convertible's front wheels are Air Breathers designed to reduce drag
around the wheel arches. Together, the Air Breathers and Air Curtains
underline the sporting character of the car's design and provide
tangible evidence of the innovative aerodynamic solutions devised by
BMW as part of the company's EfficientDynamics development strategy.
The sporting character of the BMW 4 Series Convertible extends into
the powerful design of the rear. The prominent horizontal lines and
broadly stretched L-shaped tail lights positioned at the outer edges
of the rear draw extra attention to the muscular wheel arches and wide
Three-piece retractable hardtop. Form and function.
The BMW 4 Series Convertible offers outstanding everyday driving
qualities and a dynamic design, with the top up or down. These
seemingly contradictory qualities were already combined in the BMW 3
Series Convertible, the predecessor model that set standards for
premium mid-size convertibles. The hardtop of the BMW 4 Series
Convertible features a number of design improvements that reduce noise
levels for a much quieter interior ambience. The sound-absorbing
headliner also reduces wind noise by up to 2 dB in comparison to the
All it takes is the push of a button to transform a dynamic coupe into
an elegant, athletic convertible in a mere 20 seconds. The top can
also be lowered when the vehicle is travelling at speeds of up to 18
km/h (approx. 11 mph). The vehicle's air resistance with the steel top
up is Cd 0.28 and it is just Cd 0.33 when the hardtop is retracted.
The redesigned windblock is standard in the US. The available
three-temperature neck warmers allow for comfortable open-air driving
at high speeds and low temperatures. The windblock is now smaller,
lighter and easier to use, plus it is more effective than previous
variants. When it is not needed, the windblock can be stored behind
the rear seat to save space, which is also a new feature. The BMW 4
Series Convertible also has plenty of space in the trunk, even when
the retractable hardtop is lowered. The new convertible offers wider
access to the luggage compartment, and an electro-hydraulic loading
assistance system raises and positions the folded hardtop in the trunk
as needed to ensure maximum utilization of the 7.8 cu. ft. (220
liters) of storage space available.
The loading assistance feature makes sure that there is always ample
access to the boot whether the top is up or down. Two storage
compartments on the right and left of the main luggage area are also
available for stowing small items when the retractable top is up.
When the top is up, the luggage compartment has a volume of 13.0 cu.
ft. (370 liters) that is 0.7 cu. ft. (20 liters) more than available
in the BMW 3 Series Convertible. All trunk volumes are based on ECE
measures. Even bulky items can be transported with the BMW 4 Series
Convertible. A flat and level storage area can be utilized when the
backrest of the rear bench seat is folded down. The load-through
feature, which is standard in the US, makes even more space available:
Either a wide opening between the rear passenger compartment and the
trunk, or a smaller opening, for skis for example, when four people
are seated in the vehicle.
Prominently flared wheel arches project signature sporty character.
The sporty character of the BMW 4 Series Convertible extends into the
design of the rear. The horizontal lines and stretched tail lights
positioned at the outer edges of the rear draw attention to the flared
wheel arches and wide track. The sloping rear window has a lowering
effect on the car's tail and gives the body an even more aggressive
look, and also shows off the car's shoulders. The L-shaped taillights
of the BMW 4 Series Convertible flow into the car's overall design.
They continue the path of the swage line from the flanks, creating a
link to the rear end.
Functional sportiness and elegance in the interior.
The interior of the BMW 4 Series Convertible blends sporting intent
and exclusivity to stylish effect. An approach known as layering the
clever utilization of space through the structuring of lines and
surfaces into layers provides a natural canvas for the hallmark BMW
driver focus, but is careful not to exclude the front passenger from
the action. All of the controls are arranged ergonomically around the
driver to provide optimum access to all functions. A sports steering
wheel, crystal-clear circular instruments in black panel look and the
freestanding, flatscreen iDrive monitor, the iDrive Touch Controller
all within easy reach on the center console underline the sense of
functional elegance. The dynamic horizontal lines of the instrument
panel extend into the optional two-tone door and side panel trim. This
is enhanced by the retractable hardtop cover to create an exclusive
"boat deck" look. The interior design wraps around the
driver and front passenger in an unbroken sweep and lends the interior
an engagingly dynamic feel while showcasing the typically long doors.
The interplay of surfaces and lines in the car's side panels, plus the
continuation of the accent strip, creates a visual connection between
the front and rear of the interior.
The completely new design of the electrically adjustable front seats
in the new BMW 4 Series Convertible includes integrated retractable
seat belts a feature not available on any other vehicle in this
class. If desired, the standard seats and the sport seats, included
with the Sport Line and M Sport, can be equipped with neck warmers for
the driver and front passenger as part of the Cold Weather Package in
the US. The dynamic character of the
4 Series Convertible can also be seen in the rear compartment. The
bench design is contoured to form two individual seats, with cup
holders and a storage tray for small items between them. The rear head
restraints are separated from the concealed roll bars and can be
removed if desired. The roll bars are comprised of two massive steel
elements hidden behind the rear seats in critical situations,
sensors trigger the system and the roll bars are extended in less than
Sport and Luxury Lines as well as M Sport available for
High-class material combinations, exclusive colors and opportunities
for personalization define the premium feel inside the new BMW 4
Series Convertible. As well as the basic trim level, whose material
and color concept accentuates the car's classic character; customers
have a choice of two BMW Lines as well as the popular M Sport to add
individual touches to the car's exterior and interior. The Sport Line
and Luxury Line embody different takes on the car's character,
adapting the design and color scheme for the kidney grille and air
intakes, exterior mirror caps, Air Breathers, trim strips in the front
and rear apron, door sill strips and range of wheel rims to set the
car apart externally from the basic trim level.
Sport Line: The Sport Line adds extra depth to the BMW 4 Series
Convertible with a selection of exterior body features in high-gloss
black. A sport suspension is included for rear-wheel drive models,
setting an exciting tone for the driving experience. The standard
high-gloss black B-pillars and black wrap-around window strip give the
car an even sportier look, along with nine molded high-gloss black
kidney grille slats in a chrome-colored surround. The three black air
intakes in the front apron and the likewise black Air Breathers draw
the eye to the car's aerodynamic features. 18-inch or optional 19-inch
light-alloy wheels (435i only) in twin-spoke design provide a more
performance-oriented look. From the rear, the BMW 4 Series Convertible
with Sport Line can be identified by the black trim strip level with
the rear apron and the black exhaust tips. Inside the car, black and
red accents, such as the red trim rings in the inner circle of the
instrument dials and red stitching on the sport steering wheel,
provide a pronounced contrast. Sports seats are included. The
available Coral Red interior includes Coral Red leather sport seats,
red door panel trim and a red lower section for the instrument panel.
Luxury Line: High-gloss chrome touches give the exterior of the BMW 4
Series Convertible a particularly elegant and exclusive appeal. 11
kidney grille slats with chromed fronts and matte black sides, two
high-gloss double bridges in the front apron's outer air intakes and
chromed Air Breathers all offer elegant touches. The chrome window
surround is another visual highlight, with special 18-inch or optional
19-inch light-alloy wheels (435i only) available. The BMW 4 Series
Convertible Luxury Line is recognized from the rear by a high-gloss
chrome strip in the rear apron and the chrome exhaust tips. The
interior also stands out with various chrome elements, such as the
surround for the audio and air conditioning system. High-gloss wood
strips, leather seats with stitching and a choice of two upholstery
variants in four colors highlight the possibilities in the Luxury
Line. Exclusively available for the BMW 4 Series, Ash Grain anthracite
fine wood trim surfaces and a Pearl Gloss Chrome metal inlay round off
the Luxury Line features.
M Sport: Customers wishing to endow their new BMW 4 Series Convertible
with as much of the traditional Ultimate Driving Machine character as
possible may opt for M Sport. It includes an M aerodynamic package
including numerous body components (front apron with large air
intakes, rear bumper with diffuser, side skirts) and high-gloss Shadow
Line trim. The exterior paint shade Estoril Blue Metallic is available
only with M Sport on the 4 Series Convertible. M Sport is further
distinguished by 18-inch or optional 19-inch light-alloy wheels (435i
only) in M design. Inside, features such as M door sill finishers, an
M leather steering wheel and an M driver's footrest complete the
atmosphere. Technical features of this package include M Sport
suspension (rear-wheel drive models only) and M Sport Brakes (also a
stand-alone option on all 435i Convertibles and an optional upgrade on
428i Convertible when M Sport is chosen) which includes calipers
painted in blue finish.
Hallmark BMW set-up makes the difference.
The new BMW 4 Series Convertible benefits from BMW's customary
approach of splitting steering and drive forces between the front and
rear axles, which is the ideal platform for balanced driving
characteristics, directional stability and agile handling. It also has
a 50:50 weight distribution, which sets it apart from its competitors.
Taking into account its low center of gravity, unique chassis set-up
and lightweight construction, the 4 Series Convertible is an
exceptionally dynamic overall package which will satisfy every type of
A rigorous focus on sports performance.
The chassis construction of the new BMW 4 Series Convertible is based
on that of the new BMW 4 Series Coupe. However, the springs and
damping, axle kinematics and elastokinematics have all been tailored
precisely to the character of the new convertible. Indeed, the chassis
engineers have managed to make further improvements to the agility and
accuracy offered by the chassis, thanks to modification and
fine-tuning of variables such as the camber angle, the track and the
roll center. Last but not least, special body strengthening elements
in the front section and the undercarriage of the car help to further
enhance steering precision and feedback.
Double-pivot strut-type front suspension with anti-roll bar.
The front suspension of the new BMW 4 Series Convertible combines
maximum stiffness with minimum weight. Aluminum torque struts,
wishbones and swivel bearings bring a reduction in unsprung weight. At
the same time, the engineers optimized the kinematics of the
double-pivot suspension for agility and precision. Adjusting the
position of the control arms in the swivel bearings from their
arrangement on the latest BMW 3 Series Sedan gives the car a .7-inch
(19-mm) lower roll center, which has a positive effect on driving
performance. An additional strut between the front axle subframe and
body sill creates a stiffer overall connection between the front
wheels and the car's main structure, so the transverse forces
generated on entry into corners are transferred to the car more
directly. The BMW 4 Series Convertible responds more directly to the
driver's steering commands and displays more sporty characteristics
and greater agility. And that means it carves through corners with
ease and precision.
Five-link rear suspension enhances the car's engaging character.
The rear axle of the new BMW 4 Series Convertible is a key component
in its driving characteristics, but that does not mean comfort has
been overlooked. This construction is based on the five-link concept,
and its elastokinematics have been tuned specially for this sporting
convertible. In addition, extra-wide mounts and supports on the wheel
carriers for track and camber, slightly repositioned pivot points,
stiff control arms and suspension subframes, and the use of thrust
arms to connect the suspension with the body all provide an excellent
basis for a sporty and dynamic overall set-up. The result is precise
and assured wheel location, directional stability in any driving
situation. Aerodynamic features around the rear suspension also
contribute to driving precision.
Servotronic steering standard, Variable Sport steering optional.
A standard feature of the new BMW 4 Series Convertible is the
Servotronic system which provides speed-sensitive power assistance.
The system's precise programming results in sharper steering feel,
feedback, precision, accuracy and immediate response. The new BMW 4
Series Convertible can also be equipped with Variable Sport steering
as part of the optional Dynamic Handling Package. This provides a
somewhat "quicker" on-center steering ratio which then
varies depending on the amount of steering "lock" (angle)
applied by the driver. The result is even more-lively steering during
the "turn-in" phase of cornering, and excellent stability
mid-corner and on corner exit.
Powerful standard braking systems with lightweight construction.
The new BMW 4 Series Convertible comes equipped with powerful
swing-caliper or fixed- caliper brakes and large, inner-vented brake
discs. The calipers on the front brakes are made of aluminum. As well
as low unsprung weight, the brakes also stand out with their high heat
tolerance, excellent wet braking performance, ease of use and
excellent feel. A brake pad wear indicator and the Brake Drying
function are standard on all models.
Intelligent lightweight construction concept and aerodynamic
Dynamic performance and handling is significantly influenced by
vehicle weight. The new BMW 4 Series Convertible's intelligent
lightweight construction concept makes a major contribution to the
car's dynamic qualities. The use of high- and ultra-high-strength
multi- phase steels and tailored blanks, customized precision
components for specific applications, maximizes the body's strength.
The torsional rigidity has been increased by 40 percent compared with
its predecessor. The top also plays a decisive role in a convertible,
because the car does not have a roof serving as a permanent support
element. The BMW 4 Series Convertible is up to 44 lbs. (20 kg) lighter
than its predecessor, depending on the model, even though the new
vehicle is larger and complies with more stringent safety standards.
When the hardtop is up, the new BMW 4 Series Convertible highlights
its aerodynamic qualities with a Cd (drag coefficient) of 0.28 which
is the same figure as for the new BMW 4 Series Coupe. The convertible
achieves a Cd of 0.33 when the top is down. This is possible due to
the optimization of the front apron and the rear of the car. The BMW
Air Curtains in the front apron generate a veil of air which reduces
turbulence and therefore drag around the front wheels. The new Air
Breathers positioned rearwards of the front wheel arches divert some
of the air flowing through the wheel arches, thereby reducing air
resistance. These innovations serve to optimize fuel efficiency and
at the same time enhance the lift coefficient.
Adaptive M Sport suspension, adaptive suspension and M Sport brakes.
The M Sport suspension included is part of the Sport Line and M Sport.
It works with a firmer spring/shock absorber set-up and stiffer
anti-roll bars, and its kinematics/ elastokinematics (bushings and
bearings) have also been tweaked to suit the new BMW 4 Series
Convertible. The M Sport suspension also includes 18-inch or optional
(435i only) 19-inch light-alloy wheels. Alternatively, customers can
select a lowered (non-xDrive models) Adaptive suspension, included in
the Dynamic Handling Package, which adjusts the electronic damper
mapping to each road surface and driving situation. The driver can
also use the Driving Experience Control switch to vary the basic
suspension settings between comfort and sport, according to personal
preference. For performance-minded customers, BMW offers the M Sport
Brakes. The aluminum fixed calipers (four-piston at the front, two-
piston at the rear) and large discs combine low weight with short
Driving Experience Control switch with ECO PRO mode: extra-sporty or
efficient driving modes at the touch of a button.
The new BMW 4 Series Convertible also offers drivers the ability to
change between sporty, eco or comfort settings, depending on mood or
preference. Using the Driving Experience Control switch with ECO PRO
mode on the center console, drivers can select between ECO PRO,
COMFORT, SPORT or SPORT+ (most models). Each of these selections will
activate different settings for the powertrain and suspension
In SPORT mode, throttle response is improved and the steering becomes
more direct. If the automatic transmission is fitted, the gearshift
points are also altered for sportier driving. Depending on the car's
specification, different settings can be selected for the powertrain
and chassis components. In SPORT+ mode, the Dynamic Stability Control
thresholds are raised and Dynamic Traction Control (DTC) is activated.
The electronic limited-slip function for the rear differential can
then provide better acceleration out of corners or sharp bends.
Powerful engines maximize dynamic performance.
Owning a Convertible reflects a driver's passion for elegant lines and
top-down motoring, but it does not rule out performance driving and
high-class dynamics. The state-of-the-art powertrain technology under
the skin of the new BMW 4 Series Convertible ensures it delivers an
engaging driving experience that satisfies even the most demanding
Longitudinally front-mounted, inline engines powering the rear wheels
continue BMW's tradition in creating a drive concept that delivers
great driving pleasure. Both engines available for the new BMW 4
Series Convertible use BMW TwinPower Turbo technology, which combines
sporty performance characteristics with improved efficiency. Available
from launch are an inline six-cylinder engine for the BMW 435i
Convertible and a four-cylinder unit for the BMW 428i Convertible.
These award-winning engines not only supply the BMW 4 Series
Convertible with outstanding acceleration and elasticity, they also
keep the cars weight down to improve driving dynamics and lower fuel
The elite athlete: award-winning inline six-cylinder engine.
The new BMW 435i Convertible gives full value to performance-minded
drivers thanks to a refined high-revving inline-six engine with
instant power delivery and great fuel efficiency. Equipped with High
Precision Direct Injection and Valvetronic fully variable valve
control, the 3.0-liter engine with aluminum crankcase develops maximum
output of 300 hp between 5,800 and 6,000 rpm. Peak torque of 300 lb-ft
is generated at 1,200 rpm and remains on tap up to 5,000 rpm.
The multi-award winning six-cylinder engine allows the new BMW 435i
Convertible to accelerate from 0-60 in about five-and-a-half seconds,
on the way to an electronically limited 250 km/h (155 mph) top speed,
when equipped with performance tires.
Low weight, high performance: the four-cylinder for the BMW 428i
Smooth power delivery, available torque, high revs and low weight
define the 2.0-liter four- cylinder turbocharged engine. BMW's engine
technology package including High Precision Direct Injection,
twin-scroll turbocharging, Double-VANOS variable camshaft control and
Valvetronic throttle-less intake technology offers high performance
potential combined with low fuel consumption and emissions.
The cutting-edge four-cylinder engine of the new BMW 428i Convertible
generates maximum output of 240 hp at 5,000 6,500 rpm and peak
torque of 255 lb-ft, which the driver can access between 1,250 and
4,800 rpm. This allows the 428i to sprint from 0 to 60 in about 6.2
seconds and has an electronically limited top speed of 250 km/h (155
mph), when equipped with summer performance tires. The engine gives a
smooth power delivery from the moment it spins above idle to the upper
regions of its engine speed range along an almost linear curve.
8-speed Sport automatic transmission.
The standard high-performance 8-speed Sport automatic transmission
with its extra gears, quick gear changes and delightful shift comfort
is perfectly matched to the character of the new BMW 4 Series
Convertible. With only small changes in rpm between gear ratios, the
ideal gear is on hand in virtually any situation out on the road. Many
technical features and internal efficiencies ensure powerful
acceleration and short bursts of speed are possible with no additional
fuel consumption. The 8-speed automatic's intelligent control
technology enables quick shift and reaction times and direct downshift
capability. Drivers may also shift gears using paddles on the steering
wheel. Drivers can choose between Normal and Sport transmission modes
using the gear shift lever or the Driving Experience Control switch.
BMW xDrive: intelligent all-wheel drive available on the 428i
As an alternative to rear-wheel drive, the 428i Convertible can also
be specified with BMW xDrive intelligent all-wheel drive. As well as
sharing all the traditional virtues of all-wheel- drive systems such
as increased traction, safety and the optimum transfer of engine power
to the road BMW xDrive can also reduce oversteer or understeer that
may occur in cornering situations. In the process, it enhances agility
and precision, e.g. when turning into corners or when accelerating
strongly out of them.
Auto Start Stop, Brake Energy Regeneration, ECO PRO mode.
The new BMW 4 Series Convertible comes with the Auto Start Stop
function. Another standard feature is Brake Energy Regeneration, which
ensures that as far as possible power for the vehicle's electrical
system is generated during braking and coasting. ECO PRO mode is
effective in helping the BMW 4 Series Convertible driver maintain an
efficient and economical driving style. As well as tweaking the
accelerator's responses and the engine management system, ECO PRO also
benefits from intelligent energy and climate management. The system
gives the driver tips and ideas relevant to the driving situation at
hand on how to reduce fuel consumption even further through
adjustments in personal driving style. Average fuel consumption can be
cut by up to 20 percent in ECO PRO mode, with a corresponding boost to
the car's range on a tank of fuel.
On-demand operation of ancillary units saves energy.
The new BMW 4 Series Convertible's ancillary components also play a
role in the car's intelligent energy management. Examples include the
on-demand coolant pump, the map- controlled oil pump and the Electric
Power Steering system, which only consumes electricity when steering
assistance is actually required. The special air conditioning
compressor works on the same principle. As soon as the driver switches
the air conditioning off, the belt drive to the compressor is
disconnected to minimize power drain.
Intelligent lightweight design reduces fuel consumption and CO2
The use of lightweight materials makes a significant contribution to
efficiency and agility, and helps to give BMW cars their impressive
dynamic capability. Weight savings can be found in every area of the
development process. As well as the use of plastics and cutting- edge
composite materials, the increased deployment of aluminum components
in the engine and chassis construction has also reduced the weight of
the corresponding assemblies.
BMW Assist: Standard with 10 years of eCall with enhanced Automatic
Collision Notification and BMW Teleservice.
BMW Assist will be standard on the new 4 Series Convertible. It will
include 10 years of eCall emergency calling and enhanced Automatic
Collision Notification as well as BMW Teleservice. BMW Assist eCall
includes enhanced Automatic Collision Notification, which includes the
groundbreaking Urgency Algorithm, developed in cooperation with the
William Lehman Injury Research Center in Miami. In addition to the
vehicle's exact position and direction of travel, details of the
vehicle model and all the data gathered by the sensors in the car are
relayed to the call center as well. This information provides
indications as to the nature and severity of the collision, while the
deployment of the car's restraint systems gives an idea of the number
of people injured and allows frontal, rear, side or even multiple
collisions to be identified and differentiated. The Urgency Algorithm
transmits the likelihood of severe injury. On the basis of all
accident-related data, the call center decides which and how many
emergency services are required at the accident site (e.g. doctor,
paramedic, fire brigade, helicopter). The data also enables the first
responders to alert the appropriate medical care for those involved in
the accident before they have even arrived at the scene. The call
center will also stay in contact with the vehicle's occupants until
the emergency services arrive, speaking to them in their native
language where possible. As well as automatic activation, the system
also allows the driver or front passenger to trigger the emergency
call manually in order to help other road users in distress by
alerting the call center.
TeleService tells the driver if and when maintenance is required.
Fixed service intervals become a thing of the past, because the
intelligent maintenance system, Condition Based Service, constantly
monitors your vehicle's service needs. When necessary, the vehicle
communicates service-relevant data to the nearest BMW Service Center
by making an Automatic BMW TeleService Call.
BMW iDrive: The BMW 4 Series Convertible gets the latest version
BMW's groundbreaking user interface has undergone constant improvement
and development since its inception in 2002. On the heels of its most
recent update, BMW's iDrive will see significant enhancements for
model year 2014. Not only will more models receive the latest iDrive
4.2, but the system gets enhancements that improve the user experience
in the areas of navigation, Advanced Real Time Traffic Information,
connectivity, entertainment, online access and voice commands. One
example is the ability to engage automatic time setting. When active,
the time will automatically be adjusted for Daylight Saving or
Standard time as well as changes in time zone while traveling.
BMW Navigation Touchpad, Point-of-Interest voice search and enhanced
route tailoring among highlights
The latest BMW navigation system, which is optional on the new BMW 4
Series Convertible, has received many enhancements.
Before setting out, the prescribed route can be tailored to avoid
certain areas, for example, if the user anticipates heavy traffic or
knows of construction on that route. The system will recalculate the
route to avoid the selected area. Multiple areas to avoid can be
selected for a given route and the size of coverage is fully
The online Google search function has been enhanced for customers who
subscribe to BMW Online. Users can now search for points-of-interest
(POI) via voice. Once the user has spoken their POI, the navigation
system can then guide the driver to their desired destination.
Advanced Real Time Traffic Information was significantly enhanced for
iDrive 4.2 to provide a clearer view of traffic congestion using
green, yellow and red indicators along the route to indicate the
degree to which roads are clear or congested. The traffic incident
view has been enhanced again to provide more precise indications in
red of the specific location of stopped traffic.
When equipped with the BMW navigation system, the new 4 Series
Convertible will include the new iDrive controller with Touchpad. The
touchpad is integrated into the top of the controller and does not
require a separate location. Phone numbers, contact names and address
can be written out directly on the touchpad. The user can seamlessly
switch between the touchpad and the controller while information is
being entered. The touchpad can also be used to zoom in and out on the
High-res projection in color: optional full-color Head-Up Display.
One of the highlights of the new BMW 4 Series Convertible is the
available full-color Head- Up Display. HUD projects key information
onto the windshield to appear directly in the driver's field of view
to minimize the time the driver has to look away from the road.
Depending on the vehicle specification, not only is the current speed
displayed, but speed limits and passing restrictions are also flashed
up for the driver's benefit, along with navigation instructions and
various warning messages. The variety of driver assistance systems
available for the new BMW 4 Series Convertible brings the amount of
information that can be shown in the Head-Up Display to a whole new
level. The intensity of the projections adapts automatically to the
light conditions and follows the illumination of the cockpit dials.
The positioning of the projections on the windscreen can also be
adjusted using the iDrive Controller.
Active Driving Assistant warns the driver of a possible collision with
A camera fitted to the rear-view mirror scans in front of the vehicle
and uses image processing to detect any people or vehicles within its
field of vision. When it recognizes a risk of collision with the
vehicle in front, the system produces an audible warning and a visual
signal appears in the instrument cluster or the optional Head-Up
Display (if specified) to alert the driver. Should a collision be
unavoidable, automatic moderate hazard braking is actuated. During
urban journeys in sufficient light conditions, if the system detects a
potential collision with a pedestrian, it warns the driver and, if
necessary, triggers automatic hazard braking. In both cases in
addition to the warnings the vehicle's brakes are automatically
primed for emergency braking and the activation thresholds of the
Brake Assist system are lowered. The Lane Departure Warning system is
also a part of the Driving Assistant option.
A system of many talents: Active Cruise Control with Stop & Go
The latest development stage of the familiar Active Cruise Control
with Stop & Go function (ACC Stop & Go) uses a front-mounted
camera on the rear-view mirror in addition to the full-range radar
sensors to provide an enhanced interpretation of the traffic situation
ahead. When driving in slow-moving traffic or traffic jams, the driver
is able to safely move along with the flow of traffic and let the
vehicle's automatic systems handle the tasks of stopping, pulling away
again and approaching junctions where there are already vehicles
waiting ahead. Combining radar and video data in this way improves
detection of other vehicles and reduces the system's reaction time. If
a vehicle ahead brakes very sharply in free-flowing traffic, requiring
the driver to take action, he or she is prompted to do so by a
two-stage warning. Active Cruise Control with automatic distance
control is now available at speeds between 20 and 130 mph (30 km/h and
210 km/h). The intelligent cruise control function remains active at
speeds above 130 mph (210 km/h).
Using sensors and camera monitoring: Active Blind Spot Detection and
Lane Departure Warning systems.
Among the convenience and safety-enhancing assistance systems on offer
are Active Blind Sport Detection and Lane Departure Warning, with the
latter available as part of the Active Driving Assistant option. These
systems use radar sensors and camera monitoring to alert drivers to
potential collision risks when changing lanes or if they veer out of
lane unintentionally. It also issues a warning when driving too close
to the vehicle ahead.
LED High Beam Assistant with intelligent control.
The BMW 4 Series Convertible is available with the option of full-LED
headlights, which provide a further safety boost when driving at
night. The optional High Beam Assistant in conjunction with full-LED
headlights ensures that the driver can enjoy optimal visibility at all
times without having to switch manually between high and low beam. The
High Beam Assistant adapts to the traffic situation by switching to
low beam on one or both sides.
Superb overview not just when parking: Surround View, Side View, Top
View and Parking Assistant.
In addition to the rear view camera and Park Distance Control,
customers are also able to get the Surround View function with Side
View and Top View, which provides a bird's-eye view of the BMW 4
Series Convertible and the area around it. It enables the driver to
carry out precise maneuvers in tight spaces. If the car is moving at a
speed under 12 mph (20 km/h), the Side View function can additionally
be activated to allow the driver to keep an eye on cross-traffic.
Another convenience system is the Parking Assistant system, which is
able to maneuver the car into parking spaces parallel to the direction
of travel. All the driver has to do is operate the accelerator and
brake pedal while the Parking Assistant takes care of the steering.
The new 4 Series Convertible is a technical tour-de-force which is, at
its heart a true BMW. The 2014 428i Convertible and 435i Convertible
will arrive in US showrooms in the first quarter of 2014.