14. 1989 Pontiac Trans Am 20th Anniversary
In 1989, Pontiac celebrated the 20th anniversary of its favorite muscle car, the Trans Am. So what better way to do that than to introduce a limited run of 1,500 vehicles to commemorate the occasion? Pontiac decided the anniversary edition had to have a twist, and not just another decal or fancy paint job.
So, Pontiac decided to install a Buick 3.8-liter turbo V6 from the GNX, creating the fastest Trans Am of the decade. The white commemorative edition could accelerate from 0 to 60 a full second faster than the GNX at 4.6 seconds. The reason was simple. The anniversary version got better weight distribution and gearing from the Pontiac gearbox.