24. Buick Riviera GS
They presented the Buick Riviera in 1963 and immediately, it became one of the most interesting cars on the American market. The combination of sleek and elegant styling with the modern interior and the powerful Nailhead engine made the Riviera an instant bestseller. In fact, it was the first real competitor to the famous Ford Thunderbird.
But Buick wanted more so the company introduced the legendary Riviera Gran Sport or GS in 1965. The car featured a revised suspension, bigger 425 engine, and a host of other performance upgrades. In this version, the Rivera was a true world-class automobile.
It delivered 360 HP with an acceleration time of 7.9 seconds, which was better than most of the sports cars of the period. The Riviera as a model stayed in production until 1993. But the first three generations, especially the GS models, remained the most sought after and some of the best luxury muscle cars Detroit ever produced.