If you want to accelerate faster than anyone else you don't need a Bugatti. There are other cheaper cars that do the job. The Ultima GTR is one, and the Caparo T1 will be another. Maybe the SSC Ultimate Aero TT is another.
The Bugatti Veyron gets to 100 mph in about 5.5 seconds - the actual figure varies according to who timed it. However,the Ultima GTR can reach 10 mph in 5.3 seconds which is blisteringly quick - that was timed independently.