My Trans Am (150 MPH+) I still haven't top it out yet. A 93 Acura NSX (what a rush) which had the best sound of speed (think Formula 1 racing). My 95 Thunderbird SC (145 MPH). A friends 89 Mustang GT (139 MPH).
The Quickest car I've ever ridden in was a 1969 Chevelle 454 SS. It would lift the front tires off the ground and spin the slicks in all 4 gears.