4. Pontiac Trans Am 20th Anniversary Model
In 1989, Pontiac celebrated the 20th anniversary of its favorite muscle car, the Trans Am. They decided to introduce a limited run of 1,500 cars to commemorate the occasion. But they wanted their anniversary edition to be special, not just another decal and paint job. So Pontiac decided to install Buick’s 3.8-liter turbo V6 from the GNX to create the fastest Trans Am of the decade.
It turned out to be extremely rare and expensive. The white commemorative edition could accelerate 0.1 seconds faster than the GNX from 0 to 60 mph at 4.6 seconds. The reason was simple. It had a better weight distribution and gearing from a Pontiac gearbox. Today, these are rare and highly-prized collectors’ editions.