This sleek grand tourer comes as a four-door Gran Coupe, a stylish hatchback, or a convertible. Power comes from a 3.0-liter, turbocharged six-cylinder or a 4.4-liter V8 engine, mated to either an eight-speed automatic transmission or a seven-speed automated manual in the high-performance version. The V8 delivers ferocious acceleration and an invigorating exhaust note. Handling is sharp, and the ride is compliant and controlled. The cabin is quiet. Controls take some getting used to but ultimately prove logical, except for the gear selector for the automated manual (DCT) on M versions. The M6 is a more performance-oriented, track-ready version. It's quick, capable, and enjoyable to drive.