BMW created an all-new 5 Series for the 2011 model year, but the hits just keep on coming. For 2012, BMW dumps the 3.0-liter six in the base 528i and substitutes a 2.0-liter turbocharged four. With a bump in horsepower, torque and efficiency, this would seem to be a win/win/win for the consumer. However, Americans have been historically reluctant to spend big bucks on small powerplants. Hopefully, the dynamic has changed with escalating gasoline prices and growing awareness of global warming. The larger Gran Turismo uses 6-cylinder and 8-cylinder engines.