World's Fastest Production Car

The SSC Ultimate Aero has an average top speed of 256.15 mph, besting both the Bugatti Veyron and Koenigsegg CCR

Shelby Supercars (SSC) has reported a world record 257mph run in speed testing of its 1183bhp, twin-turbo V8 Ultimate Aero TT. The first pass was recorded at 257.41mph (414.31kmh) and the second pass was recorded at 254.88mph (410.24kmh) in testing on a temporarily-closed two lane stretch of public highway in the company's home state of Washington for an average top speed of 256.15mph.

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