1987 Buick GNX: The Turbo V6 That Humiliated Supercars | Full History & Why It Matters

The 1987 Buick GNX is one of the most legendary American performance cars ever built. Created as the ultimate evolution of the Grand National, the GNX pushed Buick’s turbocharged 3.8L V6 to new heights — delivering performance that embarrassed Ferraris, Corvettes, and Lamborghinis in the late 1980s.

Built in partnership with ASC/McLaren and limited to just 547 units, the GNX featured upgraded turbocharging, improved cooling, a reinforced drivetrain, unique suspension tuning, and unmistakable sinister styling. Officially rated at 276 horsepower (a deliberate understatement), real-world output was significantly higher, making the GNX one of the quickest production cars of its era.

In this video, we explore the complete history of the 1987 Buick GNX — how it was engineered, why Buick ended production at its peak, and why the GNX is now one of the most valuable and respected American performance cars ever made.

In this video, you’ll learn:

How the GNX evolved from the Grand National

Engineering upgrades that made the GNX so fast

Why Buick understated the horsepower rating

How the GNX compared to contemporary supercars

Why GNX values continue to climb decades later

If you love turbocharged performance, 1980s legends, or rare American muscle, this video is for you. Share your GNX memories in the comments!