The 6-series coupe and convertible were added to the BMW line in late 2005, slotted between the 5- and 7-Series cars. For 2007, the model designations change to 650i to reflect the larger, more powerful 4.8-liter, 360-hp V-8 that powers the car. It can be paired with the choice of three six-speed transmissions, including a six-speed manual, a Steptronic six-speed automatic, and BMW’s Sequential Manual Gearbox, which features shift paddles on the steering wheel. A Dynamic Driving Control system allows the driver to engage a “sport” mode gives quicker throttle response, reduced steering boost, and more aggressive shifts with the automatic or sequential-shift transmissions. Other technical features include Active Roll Stabilization, Active Steering, run-flat tires, a head-up display (HUD), and BMW’s iDrive system. A high-performance “M” edition of BMW’s large coupe was added to the line for 2006. Like the M5 sedan, it is powered by a 500-horsepower V-10 engine that comes mated to a six-speed manual transmission; it can reach 60 mph in about 4.5 seconds.