#2013Viper #SRT #Leather Massive power from normally aspirated V10 engine; outlandish cornering grip; excellent touchscreen display and electronics interface; still a raw sports car at its core. The 2013 SRT Viper packs an 8.4-liter V10 that generates a peak output of 640 hp and 600 lb-ft of torque. Power is sent to the rear wheels through a six-speed manual transmission.