The Buick GNX was a super version of the Regal Grand National built to honor its passing. McLaren Engines, Incorporated got the job of developing a special high tech, turbocharged V6 with an intercooler, fuel injection and electronic controls. It gave 276 horsepower at 4,400 RPM. The performance modified suspension featured a longitudinal torque box. … Continue reading 1987 Buick Grand National GNX Test Drive