Speed limits

Bing said:
BMWZ4MC said:
Not my photograph...

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Love this :thumbsup:

Can't decide what's cooler - the speed or the MPG :lol:
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Maybe it was this guy:
Driver faces $1,000,000 speeding fine

A driver who hit headlines around the world for getting clocked in Switzerland at 290km/h (180mph) faces a world record fine of a million francs.
 
yeah the 155 limit was a 'gentleman's agreement' for some German car makers...

Audi 'forgot' about it for a few of their cars, but all beeeemers I've had were pretty much on the mark.

having spent a lot of time working in Germany, you get used to using a lot more power of your cars, and many an email has been sent out by my passengers at 130 + mph....

the driving standards are obviously much better over there.... it's hard work in the UK trying to do 70mph on our motorways sometimes! :wall:

I do like the motorbike one better mind you... limiting them to 186mph... what an odd number... but hence why I made sure my ninja was the unrestricted model... for no reason other than to say.... this was so fast they banned it... such a child.... lol
 
markeg said:
Adamski said:
Over 155mph, there's too much aero lift to drive the car safely. Or so I've been told.
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The alpina spoilers (front and rear) are meant to counter that.
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I don't know the figures for the ///M bumpers, but Sport-Auto conducted tests in the Daimler-Chrysler wind tunnel with, amongst others, an Alpina Roadster S and a 3.0Si coupe. This showed that at 200km/h (124mp/h) the standard Z4 front bumper generates 28kg of lift and the Alpina bumper produces 2kg of downforce. The rear of both still produce lift but the coupe produces 43kg and the Alpina spoiler reduces this to 40kg

As a comparison (front/rear at 200km/h):

Alpina Roadster S: 2kg down / 40kg lift
Z4 3.0 Csi: 28kg lift / 43kg lift

Porsche 997 Carrera S: 20kg lift / 7kg lift
Porsche 987 Boxster S: 25kg lift / 20kg lift
Porsche Cayman S: 30kg lift / 19kg lift
 
I heard that the limit was set to encourage male customers to choose cars according to less juvenile criteria than top speed, as a favour to women.
 
Thanks Guys,
An interesting discussion which I only raised as my mate bought a Boxster at the same time as me and his top end is 167. German manufacturer but no limiter???
 
IIRC it was to appease the green party in Germany, but only Audi, Mercedes and BMW - Porsche I don't think has ever signed up to it.
 
Bing said:
I have never tried to v-max my Z yet, still To Do... Requires me finding a bit of straight, safe, quiet motorway, probably at about 3am. However I have read on here previously that the M will travel past 155 if it is in 5th gear - I am sure someone has had one up to a GPS indicated 169mph on an autobahn. Seems the limiter only kicks in when in 6th for some reason ?
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That was mine - top down as well on the motorway.

No feeling in my head though ... :cry: (and that is with hair :D )
 
Certainly the MR will push towards 170mph, in 5th, with the roof down and a little still in reserve. (The car not me). :D It's an interesting exprience and not one to be repeated on UK roads.

I've never tried it with the roof up, as I still remember the noise of a sunroof poping out on a Ruf Turbo at Brunters, :cry: let alone a soft top.
 
Brasseye said:
is it something to do with max speed ratings on tires ?
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This is what I've always believed. (Limitation of various components - albeit that info was sourced from James May I think)
 
original guvnor said:
No the tyres are rated to at least 300km/h (186mph) on the M's.
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I did think that when I read the post on the motor bikes being limited to 186mph. Assuming bike tyres are similarly rated. The 155 was just an agreement between manufacturers. A bit like the 280bhp limit the Japanese had in place for several years.
 
There seems to be a call in some German states to impose speed limits - There were articles in the press last year that linked the severity of Autobahn accidents with high speed.
It's hard to argue with their logic!
 
buzyg said:
original guvnor said:
No the tyres are rated to at least 300km/h (186mph) on the M's.
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I did think that when I read the post on the motor bikes being limited to 186mph. Assuming bike tyres are similarly rated. The 155 was just an agreement between manufacturers. A bit like the 280bhp limit the Japanese marketing departments had in place for several years.
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Corrected that for you. Think the engineers used to do things like put restricters in whilst testing, run on crap fuel, or just lie about some of the figures....
 
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