Jaguar C-XF specs Top Speed: 155 mph / 250 km/h (limited)Engine: V8 4.2-liter 420HP SuperchargedJaguar C-XF concept car is a four-seater that is powered by an enhanced version of a sophisticated and powerful 4.2-liter supercharged V8 engine that is capable of producing 420 horse power and 400 lb-ft of torque. This racing engine accompanied by a 6-speed automatic transmission gearbox (with Jaguar Sequential Shift manual gearchange capability) delivers superb sporting performance. Note that C-XF is a concept car with top speed electronically limited to 155 mph, if it were a production car, it could reach an unrestricted speed of 180 mph without the electronical limitations