Buick's lineup of midsize Century coupes, sedans and station wagons — downsized in 1973 from full-size models — proved versatile during the 1970s, when oil shocks and government regulations forced automakers to adopt smaller engines and bodies.
The car proved its mettle when Buick, for only the third time, served as the official pace car of the Indianapolis 500 on May 25, 1975, with the Century coupe.
The 1975 coupe was based on General Motors' rear-wheel-drive A-body platform, which was a monster seller for the company. The A-body Oldsmobile Cutlass, for example, was America's top-selling car in 1976. A-body stablemates included the Chevrolet Malibu, Monte Carlo, El Camino and Chevelle; the Pontiac Grand Prix, Grand Am and LeMans; and several others.