The 1986 Grand National's 3.8L V6 turbo engine now produced 235 hp and 330 lb-ft of torque with the help of an intercooler and a sequential port fuel injection system.
The 1985 Grand National remained largely the same with the exception of a revised front grille. The lack of changes stood as a testament to its engineering.
The Grand National actually debuted in '82, but most don't realize because these cars were not painted black. All started out as charcoal gray Regals that were shipped off to Cars and Concepts of Brighton, Michigan.
All good things come to an end, and Buick decided to go out with a bang for its final Grand National. New for 1987 was the GNX produced by McLaren Performance Technologies/ASC.