Video: How the BMW M3 sound has evolved.

Throttle butterflies to their horizontal position, in this video we have every iteration of BMW M3 and the objective of this scientific test is to find out which sounds the best. Nothing more to it than that, although the desire to own them all one under one garage roof is now stronger than ever!

Oh, which is our favourite? We thought the E36 epitomised high-revving six best but then settled for the E46 CLS with that half thrum, half metallic zing.