39: 1989 Pontiac Turbo Trans Am
In the 1980s, General Motors experimented with turbo-powered V6 engines instead of traditional small-block V8s. The Buick Grand National is probably the most well-known example of this combination, but there was another car that GM released around this time with the same setup (via Barrett Jackson).
That car was the 1989 Pontiac Turbo Trans Am, a performance car produced using the same turbo setup. Many enthusiasts don’t realize this car ever existed. The comparable model, which used a 305 V8 engine, was much less powerful than this turbo-powered example.