I own two BMW's, a 2002 330 and a recently purchased 95
325i. The 325i seems very sluggish compared to the 330. I
know there is a big horsepower difference, but is the
gearing in the 325i that much different from the
330....whether that's transmission gearing or axle
gearing....are they that much different? Or is my whole
perception of sloooooow-ness due to the horsepower
difference? Both cars, by the way, are automatic transmissions.
Yes, what Floyd said. Plus there is a much bigger difference in torque
than Horsepower between a '95 2.5 liter engine and the '02 3.0, partly
because of the displacement and partly because the '95 is single VANOS
and the '02 is dual VANOS.
Also, with an auto box in the '95 you never really get the engine up
into the power band of that engine. I have a '95 and the best power
doesn't really come-on until ~4000 rpm. With an automatic the
transmission shifts before you can ring it out. How does it feel when
you put the trans in "sport" mode? Better?
Finally, it could be that your '95 has some problems that make it feel
wimpy. Try to find another '95 you can drive and do a comparison.
Is that how you normally drive your cars Dave?
I have a 540iA (only automatic car in the mini-fleet) and I could
probably count the number of times I have mashed the kick-down switch on
both hands. It will down-shift under acceleration without mashing the
switch and accelerate quite nicely. It has only been under *extremely*
(ahem) spirited driving that that switch has been actuated.
My point was that, under normal everyday driving conditions, the later
models 2.8 and 3.0 dual vanos engines, with their fatter torque curves
biased toward slightly lower rpms, will feel a lot peppier in car
equipped with an automatic transmission than the 2.5 liter single (or
non) vanos engines of the early 90's.
If I want to 'ring it out', yes. Otherwise I'm happy to have it change up
normally. I can't see any point in using high revs on a light throttle,
but then YMMV.
Yes. So I don't really see your original point?
But that equally applied to the manual cars. If you wished to make fast
progress you had to rev them regardless of auto or manual. And the auto
will up the shift point on wider throttle settings.
So saying, I'm referring to the ZF as fitted in the UK. IIRC many US cars
didn't use this.
*If you think nobody cares about you, try missing a couple of payments *
Dave Plowman firstname.lastname@example.org London SW
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.