The stock Bugatti Veyron goes 253 mph.
If you mean top speed. Bugatti Veyron 407 kmph (252 mph) Bugatti Veyron Supersport 431 kph (267 mph) Bugatti EB110 343 kmph (213 mph)
The Bugatti Veyron
It goes 268 mph.
407 kpmh (253 mph)
253 mph
Car and Driver magazine clocked the Bugatti Veyron at 253 MPH.
61 MPH depending on surface
It goes 252 MPH
The Bugatti Veyron has was rated as the top speed in automobiles for 2014 by TopSpeed magazine. It was clocked at a speed of 267 mph.
2015 Bugatti Veyron 263 mph. 2015 Koenisegg Agera 273 mph top speed
Don't know about 'most' but the 1001hp 16 cylinder Veyron Bugatti does 268 mph