The 2008 BMW 6-Series has stunning performance, especially as a 500-horsepower M6.
The 650i gets its drive from a 360-hp, 4.8-liter V-8 mated to either a 6-speed manual or a 6-speed automated-manual shifter, which has no clutch pedal but uses a single clutch to shift in either standard or Sport modes. BMW says the 650i Coupe hits 60 mph in 5.3 seconds, while Convertibles take 0.3 seconds longer. Both are limited to a 155-mph top speed.
The 6-Series has a "mellifluous V-8," says Car and Driver. 'There's plenty of torque," Edmunds reports of V-8 cars. The engine, they say, is "silken and anxious to rev." Cars.com points out the convertible carries "463 pounds extra," so its acceleration is notably slower. BMW uses aluminum in the suspension, hood and doors, Edmunds says, though it's still a 4,000-pound car.
The high-output M6 joined the lineup for 2006. Power comes from a V-10 mated to a 6-speed manual. Zero-to-60 mph times check in at 4.5 seconds. The M6's 500-hp V-10 dials back output to 400 hp on start-up, to make urban traffic smoother. A switch turns on the extra power: "Hammer the throttle," Edmunds says, "and the car bolts forward.
The 650i can be had with either a 6-speed manual or automatic, says ConsumerGuide, while the M6 offers the 6-speed "or a 7-speed automated manual." They describe the latter's action, in which gear shifts happen "via the floorshifter or steering-wheel paddles." Edmunds calls the automatic manual's performance "lackluster and inconsistent."
"Sweet-sounding acceleration" emanates from the engines, but the 6er is even better at handling, Edmunds says, thanks to "a well-balanced rear-drive chassis." Car and Driver adds it's "exceptionally stable on low-adhesion surfaces." Cars.com says a new feature "quickens accelerator response and decreases power steering assist", which gives the car "more turning precision." Though these cars are too big to be "sports-car agile," they are "balanced," ConsumerGuide says.