Road and Track magazine conducted a test of six supercars at a 3 mile long airstrip. The fastest car was a Hennessey Twin Turbo Viper (1,100 hp)that went from 0 to 200 mph in only 20.3 sec.
To read the article an see the video of the test visit:
http://www.roadandtrack.com/article....rticle_id=5680