I just bought this car and absolutley love it except...
I expected a roadster with a V8 to absolutley give me whip lash when I
floor it. It is slugish accelerating but ok at the higher speeds. Is
that the way they are or what should I be looking at? Also, the AC does
not work unless it is switched to the off position? and could probably use
a recharging. Do I recharge it with more of the same or upgrade it all
together. This is a 1980 450SL that looks great and has 103000 miles.
Paid 6,500. Did I get ripped off?
Are you aware of the displacement of the 450Sl? Do you remember the
EPA-Choked early 80's?
450 SL is approx. 274 cuIn V8 (4.5litre)... Ealrier 450's, before the
left-wing tree-huggers got a hold of it also pushed over 200Hp, at around
225... True, these cars were never hotrods, but the late 80's did give us
the 560Sl, 340+cuIn, 229HP 279lbFt torque... A vast improvement from the
mid-80's I'd say. Still, no HP monster by any means, but quite more than
adequate to move the 3800lb car pertly along, and rather quickly off line as
From a couple of web sites:
In comparing measurements expressed in horsepower, it is
important to consider not only which definition of
horsepower is being used, but also the specifications for
the conditions under which the engine is to be tested.
For example, prior to 1971, the figures American
automobile manufacturers gave for engine horsepower were
taken from tests of engines running on test stands
without mufflers or other impediments. Today the engine
horsepower numbers are for the engine as installed in the
car, which is roughly a third lower than the test stand
Horsepower is a measurement used to measure how much
power an engine develops. Today's horsepower rating is
called S.A.E. Net. The Society of Automotive Engineers
put this standard in effect when automakers began
bragging about horsepower numbers in the 1960s. Those
numbers were based on engines with no power steering,
alternator or other driven accessories attached.
Today's horsepower numbers are more accurate,
representing what one truly will get in an automobile.
Horsepower is measured with accessories, such as the oil
and water pump, attached to the engine.
Jah. The way it was explained to me, if GM saud an engine
was "245 hp" that means somewhere in a lad there was an
engine once that hit 245hp". If MB said "245hp" it means
if you pulled all the motors coming out of the plant and
found the weakest one it would still do at least 245HP.
I have no idea if this is true or not but it sounds
Not uncommon for emission controlled cars. I had a 1974 Camaro that
came with a 350 4bbl. and it had *155* HP so that is actually worse
as far as HP to displacement in a "muscle" car than the Mercedes.
Crazy, I never would have guessed they fell off that much. I knew the
compression ratios went down when the Super premium gas stopped being
96 Octane(after 1970), but I had no idea the output fell so far. I
think my Buicks are 10.25 to 1, and then by the mid 70's these V-8 had
fallen to compression ratios of about 8.5 to 1.
I always thought that the increased efficency of fuel injection and
electronic control combined with superior machine work would mean
higher output, but I guess that doesn't cover it...
Is the 1980 450SL fuel injected? I would think so...
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