Luxurious Cars

The Koenigsegg CCXR is a mid-engined roadster from Swedish car manufacturer Koenigsegg. The CCXR is powered by a modified twin-supercharged V8 engine from its predecessor 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.
Performance
The CCXR Edition can accelerate from 0–100 km/h (62 mph) in 2.9 seconds and from 0–200 km/h (120 mph) in 8.9 seconds. The CCXR can accelerate from 0–200 km/h (120 mph), then decelerate from 200 120mph)–0km/h, in 13.7 seconds. According to Koenigsegg, the estimated top speed of the CCXR is 400+ km/h (250+ mph), although this has not been officially verified. The braking distance of the CCXR is 32 m (when decelerating from 100 km/h (62 mph).

Engine
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 accelerated precipitation 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 (793 kW; 1,079 PS) at 7200 rpm and 782 lb·ft (1,060 N·m) of torque at 6100 rpm on E100 ethanol fuel. The CCX engine burns 18 L/100 km (16 mpg-imp; 13 mpg-US) on highway travel and 22 L/100 km (13 mpg-imp; 11 mpg-US) on combined travel on E85 ethanol fuel.

Exterior
The CCXR is a two-door, two-seater with a removable hardtop that can be stored under the front hood lid allowing it to be changed at any location. The body, made of pre-impregnated carbon fiber and Kevlar with lightweight sandwich reinforcements, is 169 in (4,300 mm) long, 78.6 in (2,000 mm) wide and 44.1 in (1,120 mm) tall with a ground clearance of 3.94 in (100 mm). The CCXR has a frontal area of 1.867 m2 (2,894 sq in) and a drag coefficient of 0.33. The drag area (frontal area times drag coefficient) is 0.61611 m2 (954.97 sq in). It also has a flat underside with venturi tunnels at the rear and an optional rear spoiler to improve aerodynamics. At 250 km/h (160 mph) there is 100kg of downforce.

The CCX was first unveiled on February 28, 2006 at the 2006 Geneva Motor Show although its existence was announced earlier. A derivative known as the CCXR is available, the main 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. CCX is an abbreviation for Competition Coupé 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 is 1.6 in (41 mm) taller than the CCR and, combined with the carbon fiber reinforced plastic sports seats by Sparco, the CCX allows for 2 in (51 mm) of extra headroom that Autoweek reviewer Mark Vaughn hypothesizes is "to accommodate U.S. NBA stars." The electronic control unit has also received an upgrade over the CCR meaning that the CCX is without physical fuses and it is lighter than the previous system.

Engine
Previous Koenigsegg models were powered by Ford Modular V8 engines sourced from the U.S. Though also based on the Ford Modular architecture the engine of the CCX was thoroughly re-engineered by Koenigsegg themselves and is assembled at the Koenigsegg factory. The engine block for the dual overhead camshaft, 4 valve per cylinder 4.7 liter 288 cu in (4,719 cc) V8 is cast for them by Grainger & Worrall, a British company that produces drivetrain components for Formula One cars. The engine block is made of 356 Aluminium that has undergone a T7 heat treatment, a form of accelerated precipitation strengthening. 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 provide 17.5 psi (1.2 bar) of boost with an 8.2:1 compression ratio. The engine produces 806 bhp (601 kW; 817 PS) at 6900 rpm and 678 lb·ft (919 N·m) of torque at 5700 rpm on 91 octane (U.S. rating) gasoline. 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 CCX does 14 mpg (17 l/100 km) in combined cycle and 18 mpg (13 l/100 km) in highway travel.

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. According to Koenigsegg it has a top speed of approximately 250 mph (400 km/h), although this has not been officially verified. On 15 June 2008, a standard fully equipped CCX was independently timed by sport auto in achieving a record 0-186-0 mph (0-300–0 km/h) in 29.2 seconds, beating the Mercedes-Benz McLaren SLR 722 Edition, the Lamborghini Murciélago LP640, the Porsche 997 GT2, the Alpina B6 S (based on the BMW 6 Series), and the Corvette Z06.