The Buick Regal T-Type and Grand National were standout machines in an era yearning for performance, quickly recognized as future classics even when fresh off the production line. By 1987, Buick had refined its turbocharged 231 cubic inch V6 engine to unleash over 245 horsepower. To put that into perspective, a contemporary Chevrolet Camaro, equipped with a 305 CI V8 and automatic transmission, struggled to produce a mere 190 horsepower. Standing tall at the peak of Buick’s performance offerings in 1987 was the limited-edition Grand National Experimental, or GNX – the ultimate evolution and a fitting finale to a lineage celebrated for its turbocharged prowess. This ’87 Grand National’ was more than just a car; it was a statement.
Buick meticulously crafted only 547 examples, each starting as a Grand National with its distinctive interior before being shipped to American Specialty Cars (ASC) McLaren Performance Technologies for the comprehensive GNX transformation. The enhancements were substantial, starting with a Garrett T3 turbocharger featuring a ceramic impeller and a signature GNX heat shield. A larger, more efficient intercooler was installed to further chill the intake charge, while the engine management system received a performance-oriented reprogramming. Handling was also significantly upgraded with a performance suspension system incorporating a torque bar and an exclusive GNX rear differential cover. This ’87 grand national’ GNX was built to dominate.
The heart of the GNX, its 3.8-liter V6 engine, was conservatively rated at 276 horsepower at 4,400 RPM and a formidable 360 lb-ft of torque at 3,000 RPM. Power was channeled through a specially prepared Turbo-HydraMatic 2004R transmission, ensuring robust and reliable performance. This potent combination allowed the GNX to achieve blistering acceleration, launching from 0 to 60 MPH in under five seconds and conquering the quarter-mile in the low 13-second range. The ’87 grand national’ GNX delivered supercar performance in a muscle car package.
Visually, the GNX exuded menace with its vented fenders, the deliberate absence of hood and fender emblems, and unique 16-inch aluminum mesh wheels finished with black-out faces and distinctive GNX center caps, shod with Goodyear Eagle Gatorback tires. The example highlighted, GNX number 155 of the “Fourtunate Few,” stands as an incredibly preserved specimen, boasting a remarkably low 12 miles on its odometer, showcased by its special instrumentation package. This particular ’87 grand national’ GNX also includes GNX-badged front carpet savers, a six-way power-adjustable driver’s seat, and the original ASC McLaren GNX window sticker, a testament to the comprehensive transformation that defines this ultimate turbocharged Buick. The ’87 grand national’ GNX remains a coveted piece of automotive history.
