The new BMW 3 Series Coupe will arrive in the U.S. with a choice of two six-cylinder engines including the world's first inline six with twin turbos, high precision fuel injection, and an all-aluminum crankcase. It is the most powerful engine within BMW's wide range of inline six driving machines that does not wear an "M" badge. This brand-new version develops maximum output of 300 hp in US-spec from 3.0 liters and generates peak torque of 300 lb-ft for powerful acceleration in any situation.
Featuring high-precision fuel injection, the engine boasts a highly sophisticated and advanced direct fuel injection system. In true BMW fashion this results in outstanding performance combined with a significant reduction of fuel consumption.
A further advantage of turbocharging is that this is the most economical option to boost engine power and performance. For example, the turbocharged inline six weighs approximately 150 lbs less than an equally powerful eight-cylinder displacing 4.0 liters. And this lower weight means a significant advantage not only in fuel economy, but also in balancing the weight distribution of the overall car.
Source: E90 Post