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Which BMW roadster has the better exhaust note?
The BMW Z4 M and Z4 sDrive35i meet in a direct sound battle between two straight-six roadsters with distinctly different ...
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 ...
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