Updated: Nov 28, 2020
As General Motors' first entry into the personal luxury car market segment, the Riviera was highly praised by automotive journalists upon its high-profile debut. The ground-up design that debuted in 1963 was also Buick's first unique Riviera model, and it pioneered the GM E platform.
Unlike its subsequent GM E platform stablemates, the Oldsmobile Toronado and Cadillac Eldorado, the Riviera was initially a standard front-engine/rear-wheel-drive platform, only switching to front-wheel drive starting in 1979.
While the early models stayed close to their original form, eight subsequent generations varied substantially in size and styling. A total of 1,127,261 Rivieras were produced.
Source: Wikipedia, CarStyling.ru, OldConceptCars.com