Mercedes-Benz SLR McLaren: 617 HP
The Mercedes-Benz SLR McLaren (C199 / R199 / Z199) is a grand tourer jointly developed by German automotive manufacturer Mercedes-Benz and British automobile manufacturer McLaren Automotive and sold from 2003 to 2010. When the car was developed, Mercedes-Benz owned 40 percent of the McLaren Group and the car was produced in conjunction between the two companies. SLR is an abbreviation for “Sport Leicht Rennsport” (Sport Light Racing), a homage to the Mercedes-Benz 300 SLR which served as the car’s inspiration. The car was offered in coupé, roadster and speedster bodystyles with the latter being a limited edition model.
The SLR has a 232 kg (511 lb) hand-built 5.4 L; 331.9 cu in (5,439 cc) supercharged all-aluminium alloy, SOHC 3 valves per cylinder 90° V8 engine, with a bore and stroke of 97 mm × 92 mm (3.82 in × 3.62 in) and with a compression ratio of 8.8:1. The engine is lubricated via a dry sump system. The Lysholm-type twin-screw supercharger rotates at a maximum of 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 output of 626 PS (460 kW; 617 hp) at 6,500 rpm and maximum torque of 780 N⋅m (575 lbf⋅ft) between 3,250 and 5,000 rpm.
McLaren took the original concept car designed by Mercedes and moved the engine 1 metre (39.4 in) behind the front bumper, around 50 centimetres (19.7 in) behind the front axle. They also optimised the design of the centre firewall.
