i have a 2005 rx-8, it's really not that fast compared to most sports cars. it's mainly designed to excel in cornering/handling performance. Car and driver rated it to have better handling/smoother ride than a corvette z06. Now if you slap a 3-rotor or a greddy turbo in it, that's a different story! 3-rotor turboed can push around 700-800rwhp.
and yes, gritwater, he was talking about a ford GT... mustang is nowhere near being a supercar! i don't like mustangs for the simple fact that it seems like EVERYONE has one, and they just really don't look that cool to me.. that and they usually get smoked