Erase: top speed...250km/h (155mph) Electronically Limited..

[ahmedgiyab]

Originally Posted by Ghostbat Originally Posted by tanelvali new BMW M5 will have engine's redline at 8250 rpm, by knowing the transmission numbers we can calculate that in 6th gear and at 7250 rpm (100 less of the max rpm) new M5 will be travelling at about 330 kmh Actually that is 1000 rpm less than the redline. As far as I'm concerned it's not that easy to calculate the actual top speed. You need to now things like the size of the tyres and drag coefficient. And are you sure that the new M5 will reach it's top speed in 6th gear, even if it sounds about right that 7th will be an overdrive to lower the revs.

I totaly agree!!!

[capore]

If you follow or download Top Gear programmes, in one of the last ones Jeremy Clarksson says that he can't stand Mercedes Benz decision of limiting the speed to the new CL65.
You know he sold his F355 to buy an SL 55 AMG as he needed a car that relaxed him after the job . Well...his opinion about limiting the CL65 is the same as one of the persons that have answered to this topic. In theory his car and the CL are limited to 250 kmh and reach the same speed, but logically, the CL will reaches the top speed before de SL of course.
What happens when a brand puts a big engine in a such heavy car? That has also to put into the car very wide tyres. But that isn't enough. I remember that the CL has more than 500 NM of torque at more or less at only 1000 rpm. That's an incredible amount of torque at few revs. It's impossible to this car to get a good time in a 0-100 kmh aceleration because all that torque transferred to the wheels is difficult to be assimilated by the tyres. So the only thing that he gets is to burn rubber.
Jeremy says that is preferable to moderate firstly the clutch when you acelerate in slow speed and then, when the car has reached a considerable speed (e.g. 100 kmh), put the foot down and enjoy the engine's power .

[TransAm]

Originally Posted by RC45 Originally Posted by everso well, there are a couple weird things about this speed limiter business. some cars *say* that they are limited to 155, however they really aren't. they are able to go past this figure.....i have heard of a few cars doing this. however, reprogramming the ECU or changing the ECU is definitely one way this could be accomplished. i dunno if it can be eliminated, but i think it can be increased. A blast from the past... Never heard of any "limited" cars not being limited if stated as such from the factory . Now many end up in the hands of journos after the limiter has been removed though.

A lot of US spec cars are limited to 130mph, Olds Aurora, most BMW/Audis (not the sports BMW M and Audi S/RS models though, they're 155mph) check the figures in the back pages of Road and Track magazine; you'll find the top speeds of a lot of cars are annotated 'electronically restricted'. I can assure you all (from personal experience) that a US specification BMW Z3 3.0i will not go over 130mph.

The car should just about hit 148-150mph if it was unrestricted (with the roof up) which is what UK road test results have achieved.

[RC45]

Oh - I have tested many rental speed limiters.. -- and will tell you I cannot imagine trying to take an Impala or Malibu past 130mph - they feel so disconnected from reality and quite unsafe - not unlike a 1979 1100 Golf I...

My Lincoln Towncar would refuse to go past 128mph on the speed.. probably going for 130..

[TransAm]

Well the T/A isn't restricted to 130. Not sure about 155 though, I lost my nerve as it were (the front end started to get a bit light after 140)