Behind the wheel, it's easy to forget that the M6 is a spacious four-seater that weighs 4,500 pounds. It takes off with a muted growl, and then the scenery gets blurry. The M6 hits 60 mph in 4.1 seconds and keeps sailing until the electronic limiter kicks in – at 155 mph. The seven-speed automatic transmission isn't shy about dolling out power. Any prod to the pedal produces an instant, satisfying response.
The suspension quickly dispatches any challenges thrown at it on public roads and highways. There's always the Competition Package for the feel of a street-legal racer, but the M6 doesn't need it to be thrilling. Most drivers will reach their limits long before the M6 does.
As much as we admire its power and reflexes, the M6 shines brightest as a touring car. On long stretches of road, it coddles passengers with a glass-smooth ride and an overall feel of being chauffeured rather than transported.