BMW's M division has produced some truly iconic performance cars. Since the BMW M1 made its draw-dropping debut in 1978, a range of bahn-stormers have since made an appearance - each more powerful than the model that came before. I've rounded up four of M Sport's most recent hits - the M2, M4, M5, M6 - to find out which is the fastest across both a 1/4 mile and a rolling race. BMW fans: place your bets!
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