BMW Reveals 2013 M6 Coupe and Convertible with 560HP Bi-Turbo V8

The famous M badge returns to BMW's 6-Series range with the official unveiling of the new M6 Coupe and Convertible models ahead of their world premieres at the Geneva Salon in March and the New York Auto Show in April respectively. Not surprisingly, at the heart of the M6 lies the same 4.4-liter V8 engine with two twin-scroll turbochargers found in the latest M5 sedan with the internal