With an extra car built as a spare, the Aerotech prototypes are not only the fastest cars ever produced by Oldsmobile, but some of the rarest models too. Of course, as they were far from road ...

In 1987, for instance, racing legend A.J. Foyt ran the experimental Oldsmobile Aerotech ST to a closed course record of 257.123 mph at the Firestone test oval, hitting over 290 mph on the straights.