Which Z4 sounds better? In this exhaust sound battle, the legendary BMW Z4M (E85) with its high-revving 3.2L naturally aspirated S54 engine goes head-to-head with the BMW Z4 35i (E89), powered by a ...

Which BMW roadster sounds better? In this head-to-head sound battle, we compare the raw, high-revving 3.2L inline-six of the BMW Z4M (E85) to the deep, turbocharged growl of the 3.0L N54-powered Z4 ...