Buick Regal

The Buick Regal is a line of mid-size cars marketed by Buick since 1973. Serving as the premium mid-size/intermediate car of the Buick product range for nearly its entire production, the Regal initially served as the divisional counterpart of the Pontiac Grand Prix and Oldsmobile Cutlass Supreme; since the late 2000s, the model line has been derived from the Opel Insignia. The Regal also serves as the basis of the high-performance Grand National, Gran Sport (GS), and Buick GNX coupes.

Through its production, the Regal has been marketed under a wide variety of body styles, including two-door coupes and four-door sedans (currently in production), along with a 5-door liftback sedan and a 5-door station wagon; the latter (the 2018-2020 Regal TourX) was the first Buick station wagon marketed since the retirement of both the Century and Roadmaster Estates after 1996. The turbocharged LD5 3.8L V6 used in the second generation was used to showcase the motorsports presence of the brand; though offered with other vehicles (including Chevrolets and Pontiacs), the turbocharged engine is most commonly associated with the Regal. During the 1990s, the V6 regained forced induction, with a supercharger replacing the turbocharger.

In 1999, General Motors commenced sales of its vehicles in China, with the Buick Regal serving as its introductory model of the joint venture SAIC-GM. After 2004, Buick retired the model line in North America, as it replaced both the Regal and the Century with the Buick LaCrosse. Following the introduction of the second-generation Regal for China for 2008, the model line returned to North America for the 2011 model year, slotted slightly below the LaCrosse. Following the introduction of the sixth-generation Regal (sourced entirely from Opel) for 2018, GM sold Opel to PSA (now Stellantis), ending sales in North America after the 2020 model year. Currently, the Insignia B-derived Regal remains in production by SAIC-GM.

In the full-size personal luxury car segment, Buick was the first GM division to market a vehicle (the 1963 Buick Riviera, debuting the GM E-body). As the segment expanded towards intermediate-size coupes, GM saw the introduction of a repackaged Pontiac Grand Prix for 1969 and an all-new Chevrolet Monte Carlo for 1970. The same year, Oldsmobile added a notchback roofline to its Cutlass Supreme coupe; repackaging it as an equivalent of the Grand Prix proved successful, as it became the brand's best-selling intermediate.

For 1973, GM introduced the "Colonnade" generation of its A-body intermediates. Developed in anticipation of increased rollover safety standards, GM eliminated hardtop rooflines completely (in favor of visually reinforced roof pillars); the designs were marketed as "pillared hardtops" (retaining frameless door glass on all body styles). Buick dropped the Skylark nameplate from its A-body range, replacing it with Century (last used in 1958 on its flagship B-body). As with other Colonnade intermediates, the Century was offered as a two-door and four-door sedan and a five-door station wagon.

After lagging behind Chevrolet, Oldsmobile, and Pontiac, Buick introduced an intermediate-size personal coupe for 1973, marketing the "Century Regal Colonnade Hardtop coupe". Along with a notchback roofline (with side opera windows), the Regal featured its own grille and taillamp lenses.

For 1973, Buick introduced the Century Regal as the flagship model of its A-body intermediate line. As with the lower-priced Century Luxus coupe, the Regal shared its notchback roofline with the Chevrolet Monte Carlo, Oldsmobile Cutlass Supreme, and Pontiac Grand Prix. For 1974, the Century Regal adopted a four-door sedan from its parent line, which featured a slightly fastback roofline (the Colonnade station wagon only carried the Century Estate nameplate). For 1976, the Buick Regal became a distinct model line slotted above the Century.

Interiors were upgraded over standard Century trims, with Regals featuring woodgrain trim on the dashboard and door panels (equipped with door-pull straps). Bench seats with folding center armrests were standard, upholstered in either cloth, velour, or vinyl upholstery; a 60/40 split-bench seat was optional. The 1976-1977 Regal S/R coupe was offered with reclining bucket seats with corduroy upholstery.