Might want to narrow this down some. Fastest production car? Fastest wheeled vehicle on salt flats? 4 wheels?
I know its not correct to link a wiki, but it jives with something I was reading the other day. Bugatti had to rework the Veyron because someone else had a faster top speed. The new one has a top speed of ~268MPH, and is considered the fastest road legal production car.
@474545b » Nor "someone else" : The SSC Ultimate Aero, an American-built mid-engine supercar by Shelby SuperCars!
Anyway, these cars are not the "fastest", they are just the ones with the highest top speed. I don't see them beating many cars on a narrow, slippery, wiggly, mountain road.
Interesting, but the second sentence in your link reads,
The higher-performance limited production version, the SSC Ultimate Aero TT, is the second fastest production car in the world (behind the 2010 Bugatti Veyron Super Sport),[1] with a recorded speed of 412.28 km/h (256.18 mph).