The Saleen S7 uses a 7 liter 750 HP V-8 engine. It is capable of accelerating from 0 to 60 mph in 2.8 seconds.Saleen's S7 Twin Turbo has fallen to the 5th place from last years first spot in most expensive car list. Mainly because all four nameplates ahead of it are new. However, the S7 still remains to be one of the more recognizable supercars on the list.Made in U.S.