Straight success.

The straight six-cylinder petrol engines in the
BMW Z4 Roadster.

Why does a roadster have an elongated bonnet? To accommodate six cylinders in a row. This is because only straight six-cylinder engines provide the perfect combination of weight and power coupled with dynamic balance and sophisticated smoothness. Constructed from a combination of magnesium and aluminium, the BMW Z4 sDrive23i (150 kW/204 hp) and sDrive30i (190 kW/258 hp) set new standards in dynamic engineering. With BMW TwinPower turbo technology and High Precision Injection the BMW Z4 sDrive35i runs with a sophisticated smoothness that belies its massive power output of 225 kW (306 hp). Even more impressive is the BMW Z4 sDrive35is with 250 kW (340 hp) and enormous torque of up to 500 Nm for guaranteed and uncompromised driving pleasure.