The Panamera is offered in seven versions, the rear-wheel drive 2 and S, and the all-wheel drive 4, 4S, GTS, Turbo and Turbo S. The 2 and 4 models come with a direct injected 3.6-liter 300-hp V6 engine while the S, 4S, GTS, Turbo and Turbo S feature a larger 4.8-liter V-8. The S and 4S models output 400-hp while the GTS output is higher at 430-hp. The Turbo adds even more with twin-turbocharging equaling 500-hp, which jumps to 550-hp in the Turbo S. The Porsche PDK double-clutch gearbox is standard on all models, and all are equipped with an auto start-stop feature for increased urban fuel economy. The body appears to be a four-door sedan but with a coupe-like profile and a power liftgate, rather than a typical trunk, for access to the spacious luggage area. Standard safety features include ten airbags, adaptive bi-xenon headlights with LED daytime running lights, rain sensing wipers, full LED rear lighting, four belt pretensioners and electronic traction and stability control. A small sample of optional tech features includes a 6-disc CD changer, Bose surround sound, Burmester surround sound, front and rear ParkAssist, an electronic logbook and voice control.