TO BE SOLD AT AUCTION. JUNE 22ND IN ST. PAUL, MN. 1,961 Original miles - Unrestored - Unmolested Example. Buick bosses gave the GNX program engineers the full green light to develop a car that would change the mid-1980s automotive performance industry then and forever. The result was taking an already potent Buick Grand National and moving it to an even higher level of performance. The horsepower went to nearly 300. The Buick reached 60 mph in only 4.7 seconds. The fastest production car available in the United States in 1987. Buick to teamed up with ASC/Mclaren and build the “Grand National to end all Grand Nationals”. This car was to be built as a limited production collector's car and sport the performance that would wipe away anything at the current time. GNX stands for “Grand National Experimental” and only 547 were produced. This thing was a complete monster as it was rated at 300 horsepower and 400 ft/lbs of torque. No engine modifications were made, but almost every single performance part was modified to give a bit more performance. Examples of these changes include the turbo, intercooler, computer chip, exhaust, suspension, tires, wheels, fender flares, and engine vents on the side panels. The transmission was also modified to increase performance. They were all sold out even before the first GNX was built. GNX #1 and #2 were kept by Buick themselves.
