The Koenigsegg CCX is a mid-engine sports car manufactured by Swedish automotive manufacturer Koenigsegg Automotive AB. The project began with the aim of making a global car, designed and engineered to comply with global safety and environment regulations, particularly to enter the United States car market. To sell cars in the US many alterations were made to the design of the CCR; the previously used Ford Modular engine was replaced by an in-house developed Koenigsegg engine designed to run on 91 octane fuel.
The CCX was unveiled at the 2006 Geneva Motor Show, sporting body modifications to meet US vehicle regulations and a new in-house developed 4.7L twin supercharged V8 engine capable of generating a maximum power output of 817 PS (601 kW; 806 hp) at 7,000 rpm and 920 N⋅m (679 lb⋅ft) of torque at 5,500 rpm while running on 91 octane gasoline.
The CCX has frontal area of 2,894 sq in (1.867 m2) and a drag coefficient of Cd=0.30., with a CdA of 0.56 m2 (6.0 sq ft). It also has a flat underside with venturi tunnels at the rear and an optional rear spoiler to improve downforce. At 200 km/h (124 mph) there is 60 kg (130 lb) of downforce over the front axle and 65 kg (143 lb) over the rear. The car is 88 mm (3.5 in) longer to comply with the US rear impact regulations and to free space around the rear muffler. On the interior, there is 51 mm (2.0 in) of extra headroom as well as specifically designed Sparco carbon fibre seats.
The CCXR is a more "environmentally friendly" version of the CCX, powered by the same engine, but converted to use E85 and E100 ethanol fuel, as well as standard 98 octane petrol. The CCXR required modified fuel injectors, upgraded fuel lines and piston rings, and a higher boost setting on the superchargers.
In standard form, bodywork of the CCXR features heavily optimized aerodynamics, along with optional diffusers to enhance airflow, including an optional front splitter with an aerodynamic nolder. When run on ethanol, the power increases to 1,018 PS (749 kW; 1,004 hp) at 7000 rpm and 1,060 N⋅m (782 lb⋅ft) of torque at 5600 rpm.
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