Quote:
Originally Posted by BMWGirlFL
840i 3933 #s B58C 335 hp 368@1600 4.7 0-60
840xi 4081 #s B58C 335 hp 368@1600 4.4 0-60
M850i 4478 #s N63B 523 hp 553@1800 3.5 0-60
Z4 3457 B58D 382 hp 368@1800 3.9 0-60
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Those are stock numbers and in the real world a M850i via launch control can beat that as can the Z4. Ambient temperature comes into play given a turbo charged vs super charged solution. However, even at 110 in the Phoenix summer months I still make the stock specs with a few 3.6's. In comparison though during January/February when the daytime highs were in the 60's I hit 3.3 on nearly every launch.