The 911 Carrera comes as either a coupe or a cabriolet, in either a rear-wheel drive (C2) or an all-wheel drive (C4) configuration. The 911 C2 and C4 are powered by a 345-hp direct-injection 3.6-liter flat six-cylinder engine and the S variants of the C2 and C4 are powered by a 385-hp direct-injection 3.8-liter flat six-cylinder engine. The Turbo coupe and cabriolet models sport a 500-hp twin-turbocharged 3.8-liter flat six engine and standard all-wheel drive. Transmission choices include either a six-speed manual or a seven-speed dual-clutch transmission known as PDK. The Targa, with its innovative glass-paneled roof has the same drivetrains as the Carrera C4 and C4S models. The track-derived GT3 is powered by a 435-hp 3.8-liter flat six-cylinder engine and comes exclusively as a rear-wheel drive coupe with a six-speed manual transmission.For 2010, the X51 Power Kit returns to the option list of the S models, The Turbo receives a minor face-lift, a new engine and chassis tuning, and the GT3 returns to the line-up after a one-year hiatus, with more power and refreshed styling.