Quote:
Originally Posted by Fugly M3
CanAutM3 disagrees, but I'm still inclined to think it's the cruise control blob that's not offered on the base cars. I can't think of another reason (variable) why the M3 would have two numbers I think the base M4 coefficient should probably be lower and is a misprint by BMW. Having said that, the performance difference in the two, particularly the braking from higher speeds where there is more drag, may well come down to the Pirellis vs. the Michelins. But then there is ambient temperature and humidity of testing that comes into play as well.
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As I stated previously, the M4competion is quoted with the same Cd numbers as the base M4, which tends to indicate that the cruise control radar is not a factor.
Maybe the fins on the CF roof have a greater impact on the M3 due to its greater height, so a greater difference between CF and sunroof options? Just speculating here, it could be many things.