BMW 6 Series

The history of the BMW 6 Series splits into two sections. From 1976 to 1989, BMW produced a line of shark-nosed coupes, including the 630CSi, the 633CSi, and the 635CSi, all powered by V6 engines that produced in the neighborhood of 180 horsepower to 256 horsepower (for an M6 version introduced in 1987). During its initial run, the 6 Series received a number of updates, including an improved suspension and reinforced impact-resistant bumpers. In 1989, BMW replaced the 6 Series with the 8 Series.

In 2004, BMW relaunched the 6 Series with a single trim, the 645Ci Coupe. Essentially, the new 6 Series was a two-door, four-seat version of the automaker's mid-size 5-Series, although with its own distinctive styling.

The nose of the new 6 Series has been reshaped, but it still retains a shark-like quality, with stylish flares along the sides. Double round bi-xenon headlights, a low roofline, and two sporty exhaust pipes add to the classic, refined exterior look of the new 6 Series.

In 2006, BMW replaced the 645i with the 650i Coupe and Convertible, both powered by a 325-horsepower, 4.4-liter fuel-injected V8 borrowed from the 550i. Features included a sport-tuned suspension with speed-sensitive variable-assist power steering, which ensured nimble handling in tight curves. Active roll stabilization (ARS) and Dynamic Stability Control helped keep the 6 Series on the road in tricky conditions, while electro-hydraulic antilock brakes gave the 6 Series all the stopping power it needed.

Inside, the 6 Series offered all the expected luxury-oriented amenities, including Dakota leather upholstery, brushed aluminum interior trim, eight-way power-adjustable front seats, automatic climate control, and a 10-speaker AM/FM audio system.

For 2008, BMW made some minor upgrades to the 6 Series, reshaping the front and rear end and offering a new optional six-speed Sport Automatic Transmission, which gave drivers the capability of choosing between automatic or manual shift modes. In addition, the Dakota Leather interior in the 650i Convertible came equipped with Sun-Reflective Technology to help keep the interior seats cooler and reduce color fading. BMW also added new interior color choices for 2008.

While some drivers and reviewers note that the 6 Series tips the scales on the heavy side, the V8 moves the rear-wheel-drive Coupe and Convertible along at an exhilarating pace. The new 6 Series has its detractors, especially reviewers who point out that some of its competitors offer a more comfortable ride and better value. Still, as the largest Coupe and Convertible available from BMW, the 6 Series has plenty to offer drivers who lean toward the elegance and performance of cars that sport the double-kidney design.