Originally Posted by
Wikipedia
SSC announced they had broken the speed record for the world's fastest production car with 259.12 mph (417.01 km/h) in West Richland, WA on September 13, 2007. The reported record speed came from an average of two runs in opposite directions, in accordance with Guinness Book of World Records rules. The first run clocked 257.44 mph (414.31 km/h) and the return trip 254.91 mph (410.24 km/h). The results of this test, verified by Guinness World Records on October 9, 2007, gave the SSC Ultimate Aero the title of world's fastest production car, with a top speed of 256.12 mph (412.19 km/h).[18] This beat the previous record holder, the Bugatti Veyron, that has a top speed of 253.81 mph (408.47 km/h).