The CCXR is powered by a modified twin-supercharged V8 engine from the CCX; converted to use E85 or E100 ethanol fuel as well as standard 98 octane petrol.
Besides the use of ethanol fuel, the only changes to the engine are modified fuel injectors, upgraded fuel lines and piston rings, and a higher boost setting on the superchargers. The increased power of the CCXR, compared to the CCX, is a result of the cooling properties of ethanol in the engine’s combustion chambers allowing for a higher pressure in the cylinder and the biofuel having a higher octane rating of 113 RON compared to 95 RON for gasoline in North America and 100 RON for gasoline in Europe.
The designer of the CCXR, and founder of Koenigsegg, Christian von Koenigsegg is quoted as saying, “Our engineers couldn’t quite believe the figures when we tested the car”. In March 2009 the CCXR was chosen by Forbes as one of the ten most beautiful cars in history.
The Koenigsegg CCXR engine is a 4.7 litre 288 cu in (4,719 cc) V8, with dual overhead camshafts and 4 valves per cylinder. The engine block is made of Aluminium alloy that has undergone a T7 heat treatment, a form of acceleratedprecipitation strengthening. The engine has a compression ratio of 8.8:1, is boosted by two Rotrex centrifugal superchargers that provide 1.6 bar of boost, having a patented response charge system for optimal engine response, and is injected by a sequential multipoint fuel injection system. The engine is lubricated with a dry sump system with a separate oil pump, the pistons are cooled by oil sprayed onto them and the oil itself has an external cooler.
The engine produces 1,064 bhp at 7,200 rpm and 782 lb·ft of torque at 6,100 rpm on E100 ethanol fuel. The CCX engine burns 13 mpg on highway travel and 11 mpg on combined travel on E85 ethanol fuel.