The 2014 Porsche 911 represents the seventh generation of the model, known as the '991'. Buyers could choose from several engines, starting with a 350-horsepower 3.4-liter flat-six engine in the rear-wheel-drive Carrera. A 400-hp 3.8-liter flat-six powers the Carrera S, 4S, and 50th Anniversary Edition. A seven-speed manual transmission was standard, while a seven-speed dual-clutch automatic transmission was optional. All-wheel drive was available on '4' and '4S' models. Notable features included a 7-inch touchscreen, navigation, and Porsche Active Safe, which uses radar sensors to mitigate collision risks. For 2014, the biggest change was the addition of the Turbo and Turbo S models, boasting up to 560 hp and a mind-blowing top speed of 198 mph.