Following a two-year hiatus, the third-generation M6 debuted for the 2013 model year. Like the current 6 Series on which it’s based, the latest M6 sports more traditional styling, roomier front-seat accommodations, a more useful trunk and torque-rich turbocharged performance. The new twin-turbo V8 provides a lot more shove off the line compared to the previous M6’s high-revving V10, though it lacks the old motor’s thrilling rush to redline. Initially, the dual-clutch automated manual was the only available transmission; the regular manual was introduced for 2014.