Which roadster sounds better — the naturally aspirated 3.2L inline-6 from the BMW Z4M (E85), or the twin-turbo 3.0L in the Z4 35i (E89)? This sound battle compares both engines through cold ...

The BMW Z4 had the 3-liter petrol engine with 231 HP and 300 Nm of torque and was still as good as in day one, even though the car had 80,000 miles on the odometer.

The German tuner has developed a special version of its famous SK Plus Sporty Drive supercharger system, which is suitable for the E85 generation of the BMW Z4 and the E46 incarnation of the BMW 3 ...