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The Mercedes-Benz SLR McLaren is a grand tourer car jointly developed by Mercedes-Benz and McLaren Automotive, built in Portsmouth and the McLaren Technology Centre in Woking, Surrey, England and sold from 2003 to 2010. When it was developed, German manufacturer Mercedes-Benz owned 40 percent of the McLaren Group. SLR stands for Sport Leicht Rennsport (Sport Light Racing), homage to the Mercedes-Benz 300 SLR which served as the McLarens inspiration.[ Engine The SLR McLaren sports a hand-built 5.4-litre, supercharged 626 PS all-aluminum V8 engine The SLR sports a 232 kg (511 lb) hand-built 5,439 cc (5.439 L; 331.9 cu in), supercharged, all-aluminium, SOHC, V8 engine. The cylinders are angled at 90 degrees with three valves per cylinder and lubricated via a dry sump system. The compression ratio is 8.8:1 and the bore and stroke is 97 mm andtimes; 92 mm (3.8 in andtimes; 3.6 in). The Lysholm-type twin-screw supercharger rotates at 23,000 rpm and produces 0.9 bar (13 psi) of boost. The compressed air is then cooled via two intercoolers. The engine generates a maximum power of 626 PS (460 kW; 617 hp) at 6,500 rpm and maximum torque of 780 Nandbull;m (580 lbandbull;ft) at 3,250 to 5,000 rpm.[5] The engine is front-mid mounted. McLaren took the original concept car designed by Mercedes and moved the engine 1 metre (39.4 in) behind the front bumper, and around 50 centimetres (19.7 in) behind the front axle. They also optimised the design of the centre firewall. Transmission The SLR uses AMG SPEEDSHIFT R five-speed automatic transmission with three manual modes. For durability Mercedes selected a five-speed transmission rather than their seven-speed gearbox which was more complex and used more parts. Performance A Mercedes-Benz SLR in motion Mercedes-Benz SLR McLaren 722 Menu 0:00 Mercedes-Benz SLR McLaren 722 at Goodwood Festival of Speed 2009 Problems playing this file? See media help. The car uses carbon fibre reinforced plastics (CFRP) construction in an attempt to keep the weight low. Despite CFRP materials the total curb weight is 1,750 kg (3,858 lb). Car and Driver achieved a 0 to 60 mph (97 km/h) time of 3.4 seconds, and a quarter-mile time of 11.2 seconds at 130 mph (210 km/h) Candamp;D suggests the times may be even lower if temperatures were lower. Motor Trend tested the SLR and achieved a 0-60 mph time of 3.3 seconds in April 2006. Car and Driver achieved top gear acceleration 30-50 mph (48-80 km/h) and 50-70 mph (80-113 km/h) times of 1.7 and 2.4 seconds, which are the fastest ever recorded by the magazine in a production car. The SLR also pulled 1.13 g on the skidpad.[6] Road and Track tested the car in their July 2005 Road Test and reached 60 mph (97 km/h) from a standstill in 3.5 seconds. The 0 to 100 mph (160 km/h) sprint was achieved in 7.5 seconds and a quarter mile run was completed in 11.5 seconds at 126 mph (203 km/h). This particular SLR is one of 1400 produced, collector owned with only 550 miles traveled.
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