The SuperVeloce's V12 produces 670 PS (493 kW; 661 hp) at 8000 rpm and 490 lb·ft (660 N·m) of torque at 6500 rpm, thanks to revised valve timing and upgraded intake system. The car's weight was also reduced by 220 lb (100 kg) through extensive use of carbon fiber inside and out. A new lighter exhaust system was also used. As a result of the extensive weight loss, the SV produces a power-to-weight ratio of 429 Bhp/long ton. Also standard were the LP 640's optional 15-inch carbon-ceramic disc brakes with 6 piston calipers. In its June 2009 issue, Car and Driver magazine estimated that the LP 670-4 SV was capable of accelerating to 62 mph (100 km/h) from a standing start in just 2.9 seconds and on to 124 mph (200 km/h) in 7.4 seconds. Subsequent testing by "Road and Track" revealed a 0-60 time of 2.8 seconds and a quarter mile time of 10.9 seconds at 129.4 miles per hour. Lamborghini claims a top speed of 213 mph (343 km/h) when the car is fitted with an optional smaller spoiler, or 209 mph (336 km/h) with the standard Aeropack wing.
According to Maurizio Reggiani, head of Lamborghini R&D, the LP 670-4 SV's steering was tuned for high-speed sensitivity. The original production plan of the ultimate Murciélago was limited to 350 cars, and cost $450,000 US (before options) £270,038 in 2009). However, only 186 LP670-4s were produced before the factory had to make room for the new Aventador production line. Numbered cars 1-350 do not represent the order in which cars were manufactured.
In April 2010, Lamborghini released a variant of the LP 670-4 called the SuperVeloce China Limited Edition. The car was offered for sale exclusively in China (with 12 retail outlets, China overtook Italy as Lamborghini's 2nd largest market after the USA), and is distinguished by special exterior markings.
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