Lighter, faster, more powerful, more efficient: no other element of an automobile defines its character as much as its engine. The all-new straight six-cylinder petrol engine, constructed from a combination of magnesium and aluminium, sets new standards for dynamic engineering. It runs with a sophisticated smoothness that belies its massive power output: the powerplant in the BMW 335i with High Precision Injection and Twin Turbo releases up to 225 kW (306 hp) on command, accelerating from 0 to 100 km/h in just 5.6 seconds.