25: 1975 Buick Gran Sport
The Buick brand was coming into its own during the ’70s, and most of their cars were very comfortable to drive. But around this period, cars were a lot heavier. With all that extra mass, attempting to create a zippy road car wasn’t going to happen. Buick toyed with the idea of a Grand National long before the car was created.
The 1975 Buick Gran Sport was the very first attempt at a Grand National style car. Unfortunately, with the extra mass, the car was sluggish to drive, and this made muscle car shoppers go toward something else. The resale value on these has begun to spike up, but the performance is still not satisfactory. Especially when you put the Gran Sport up against other muscle cars of the era such as the GTO.