10. 2013 Porsche Panamera GTS
Under the hood of the 2013 Porsche Panamera GTS is a modified version of the German automaker's 4.8L naturally aspirated V8 engine. Output is up by 30 horsepower to 430, while torque has been increased by 15 lb-ft to 384. Combined with all-wheel drive and the 7-speed, dual-clutch PDK transmission, the Porsche Panamera GTS can sprint from 0-100 km/h in 4.5 seconds on its way to a top speed of 288 km/h. More details on the 2013 Porsche Panamera GTS.