The new BMW 3 series will be delivered to BMW dealerships in early 2012. The latest version of this best-selling BMW model will be powered by a series of four-cylinder engines. Thanks to their turbochargers, these engines will have all the dynamics and the feel of a six-cylinder engine, yet the fuel-efficiency of a four-cylinder engine. In future, only BMW's top-of-the-range cars will be equipped with classic six-cylinder in-line engines...