Cadillac La Salle XP-715
When you see this car, you might think it was a mistake to feature Buick Riviera. But, in fact, this is not Riviera, but Cadillac’s 1961 concept they called the La Salle XP-715. Originally intended to be Cadillac’s luxury coupe, this car was almost finished in the development phase. But that was before the GM bosses decided to give the project to Buick.
The reason was that the Buick division experienced bad sales. So, they needed an interesting model to draw people back into their showrooms. So, the Cadillac La Salle XP-715 became the Buick Riviera, and the rest is history.