The 2015 Dodge Hellcat is the most powerful production car in American history. The Hellcat X features a twin-turbocharged and supercharged HEMI engine - 805 horsepower and 800 lb-ft of torque. The Hellcat X Experimental Concept—the only twin-turbocharged & supercharged Hellcat on earth. It pays homage to the U.S. Navy turbocharged and supercharged prototype XF6F Hellcat. The production version of this fighter scored a 19:1 kill ratio against enemy aircraft in World War II.