You guys' math is off. How can the RS4 have a better ratio than the M3? Assuming both are rated at 420hp, how can the heavier Audi have a better number? Even if the M3 is rated at 414hp, the Audi's extra 6hp can't possibly offset 155lbs of extra weight, can it?
My calculation using the industry standard horsepower per ton:
M3 - 265hp/ton
RS4 - 254hp/ton
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