The 911 is available as either a coupe or a cabriolet, in either a rear-wheel drive (Carrera) or an all-wheel drive (Carrera 4) configuration, as well as a Turbo all-wheel drive model. The 911 Carrera and Carrera 4 are powered by a 345-hp direct-injection 3.6-liter flat six-cylinder, and the Carrera S and Carrera 4S's are powered by a 385-hp direct-injection 3.8-liter flat six-cylinder engine. The Turbo is a 500-hp version of the 3.8-liter (530-hp in the Turbo S). Transmission choices are a six-speed manual or seven-speed dual-clutch known as PDK. 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 2012, a Carrera GTS has been added to the line-up to bridge the gap between the Carerra and the Turbo, it sports a 408-hp version of the 3.8-liter engine, and is available in rear- or all-wheel drive. Also, a limited edition of the rear-wheel drive Carerra called Black Edition has been introduced. Late in the 2012 model year, an all new 911 will be introduced, the 991-generation will be launched as a RWD coupe and convertible first, with more variations to come in the following model year.