The Grand National was introduced as a trim level for Buicks to spice up the look, but in 1984 it became an entirely separate vehicle, painted a deep black. In 1987, the wizards at GM took the evil-looking car and created the downright diabolical GNX, with a 3.8L V6 that made 276 horsepower. In 2022, 276 horsepower isn't that much, but it was pretty impressive 35 years ago.