Koenigsegg CCX

The Koenigsegg CCX is a mid-engined roadster from Swedish car manufacturer Koenigsegg. The CCX has been engineered to comply with the US regulation and market demands[2] and is an evolutionary design that replaced the Koenigsegg CCR.

CCX is an abbreviation for Competition Coupe X; the X commemorating the 10th anniversary, (being the Roman numeral for ten), of the completion and test drive of the first CC vehicle in 1996.

The CCX was first unveiled on February 28, 2006 at the 2006 Geneva Motor Show although its existence was announced earlier.[3][4] A derivative known as the CCXR is available, the difference being that CCXR's engine is tuned to run on biofuel. The different fuel and tune allows the CCXR to produce 25% more power than the CCX.

Performance
The CCX can accelerate from 0–62 mph (100 km/h) in 3.2 seconds and from 0–124 mph (200 km/h) in 9.8 seconds.[1][9] According to Koenigsegg it has a top speed in excess of 250 mph (402 km/h), although this has not been officially verified.[1] On 15th June 2008, a standard fully equipped CCX was independently timed by SportAuto in achieving a record 0-186-0 mph (0-300-0 km/h) in 29.2 seconds, beating SLR McLaren 722, Lamborghini Murcielago LP640, Porsche 997 GT2, Alpina B6 S, Corvette Z06.[10][


Engine

The engine of a Koenigsegg CCX at the 2006 Geneva Motor ShowWhile previous Koenigsegg models were powered by a Ford Modular V8 engine sourced from the U.S., the engine of the CCX was designed by Koenigsegg based on the Ford Modular architecture, and assembled for them by Grainger & Worrall, a British company that produces drivetrain components for Formula One cars.[8][12] The engine is a 4.7 liter 288 cu in (4,719 cc) V8, with dual overhead camshafts and 4 valves per cylinder.[1][8][13] The engine block is made of 356 Aluminium that has undergone a T7 heat treatment, a form of accelerated precipitation strengthening.[8][14] The aluminium alloy is stronger than the previous engine and allows a thinner, thus lighter, engine block that will withstand higher cylinder pressures. The engine is boosted by two centrifugal superchargers that increase the compression to 17.5 psi (121 kPa) with an 8.2:1 compression ratio. The engine produces 806 bhp (601 kW) at 6900rpm and 678 lb·ft (919 N·m) of torque at 5700rpm on 91 octane (U.S. rating) gasoline.[1][9] 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.[1] The CCX engine burns 14 mpg–U.S. / 17 mpg–imp (17 Liters per 100 kilometers).

Top Gear
In 2007, the CCX was the fastest car to complete a lap of the BBC Top Gear circuit, in a time of 1:17.6, until it was beaten by the Ascari A10 with a time of 1:17.3, then by the Gumpert Apollo.[17] It originally went around the course in 1:20.4, but was then fitted with a non-standard rear spoiler to provide downforce, after The Stig spun the original version off the track. The Stig purportedly recommended this modification, correctly predicting that the car would then be the fastest ever round Top Gear's track.[18] Koenigsegg stated that the improvement was due to adjustments other than the spoiler (eg. changes to the adjustable chassis and suspension settings).[