AlexFW

Hi members!

I am searching for M3 acceleration times ... I found something like 15.7 from 0 to 200 kmh (0-125 mph), by Autobild, but it is clearly impossible : the 6MT M3 has very long gears, so it cannot do 15.7s .
Otherwise the SMG3 M3 would do the same time of the M5 (due to shorter gears than the MT), that is obviously impossible .
(the M5 does 14.5-15 seconds)

So, does someone have these times from some road test ?

Thanks!

hythe

I'm not quite clear on why this all looks so impossible, Alex... The power/weight ratio of the M3 isn't THAT far off the M5. Of course, a 545i would whup them all, but that's another matter...

ipp

Anyhow, it _is_ faster than a 545i...

tachyon

"In our limited test, the M3 charged to 60 miles an hour in 4.4 seconds. That?s 0.4 second quicker than the last M3 we tested, despite a slippery road surface and hurried test schedule. Expect the ?08 to be even quicker when we get a chance to conduct a full road test." Car & Driver Sep 2007

xexyus

sapkan

Alex they seem to be right. This is Sport Auto. Sorry

AlexFW

It's a little curious that 2-3 magazines report the *same* time ...

AlexFW

With a manual transmission and a good road surface the 0-100 is quite simple .
Anyway, the 0-100 is not so significant: too elements affect the result, like the tire, temperature, humidity, type of transmission, etc. ...
From 100 to 200, instead, no tricks .

So, the M3 would do 11s from 100 to 200 .
Okay, I would like to trust those magazines...

AlexFW

Don't be so certain about this


We said the M3 goes from 100 to 200 in 11s .


Ok, look at this clip :


100-200 in less than 12s :-D

That man starts very slowly, without acceleration assist and with the DSC on .


So a 650i with a new (custom) exhaust would be fast as the M3!

Now the best part :
1. a 545i weighs like that 650i .
2. I am planning to get the same final drive ratio as that 650i, so equal gears .
3. The same gearbox .
4. But I will have more HP than that 650i (soon a dynojet to demonstrate it)

----
M3 gears and speeds :

@8500 rpm :

(kmh) 67.0, 114.7, 171.8, 228.1, 271.8, 311.7


AlexFW's 545i with 3.23 ratio @6500 rpm :

(kmh) 58.9, 99.6, 151.1, 200.6, 239.1, 274.2
----

Obviously, I will be fast as the M3 due to its looong gears (it has a 230 kmh 4th gear while I will have 200-205) .
And the "SMG3" M3, with 7 gears, will be faster than me .

This in theory .
Practically, on the road the M3 has 25% less torque than a 550i/650i (400 Nm vs 500) and a manual gearbox (so the slowest part in the M3 is the driver) .

I am at 18.5s now and my target is 16s with new FDR and catalysts/headers .

Finally, dear ipp, in the everyday use my 545i is already faster than the M3, so keep your irony for your 530d!

Will see!

AlexFW

Don't be so negative about 545i, hythe :

a) you have a 545i that is faster than the M5 .
b) on bends/mountain road my 545i is faster than yours (and you know why - signature)