
2.5- to 3-litre: BMW 3-litre twin turbo
This engine, which powers the 135i, 335i and forthcoming X6, defended not only its category but the overall Engine of the Year award. Judges were again impressed with technology quotient — like turbo turbines which can stand temperatures up to 1,050 degrees Celsius — as well as the "combination of high power and smoothness". With 225kW of power and 400Nm of torque, the turbo six has, according to BMW, the power of a 4-litre V8 yet weighs about 70kg less.
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