Hi Dragon and welcome to GTP. The search function here proves to be quite useful, as well as the "read this stickies" at the top of each forum.
Anyway to answer your question. There are two winners here. The Escudo Pikes Peak can get to over 300 mph in a straight line (1881hp) without doing the wheelie trick (1000mph+). If you want to know what the wheelie trick is, search. If you want to set the fastest time around a track then the F1 car is best.