The Buick Regal is a line of mid-size cars marketed by Buick since 1973. For nearly its entire production, the Regal has served as the premium mid-size/intermediate offering of the Buick product range. Introduced as a submodel of the Buick Century, the model line is currently in its sixth generation. From the 1970s to the 1990s, the Regal served as the Buick counterpart of the Pontiac Grand Prix and Oldsmobile Cutlass Supreme. Originally introduced as a personal luxury coupe, the Regal was later expanded to a full model line. To showcase its success in NASCAR racing, from 1982 to 1987, Buick introduced the Buick Regal Grand National, Regal T-Type, and the limited-production Buick GNX. During the 1990s, while the four-door sedan superseded the two-door coupe entirely, forced-induction engines made their return, with superchargers replacing turbochargers. For 1999, the Buick Regal inaugurated the sale of GM vehicles in the Chinese market, with the 1997 design lasting through 2008. Following the 2004 model year, Buick retired the nameplate in North America, with the Regal replaced by the Buick LaCrosse. For 2008, Opel introduced the Opel Insignia as its largest sedan, with Buick rebranding the model line as the Regal for the Chinese market. For 2011, GM reintroduced the Regal to North America, rebranding the Insignia sedan for North America. For 2018, Buick introduced the second-generation Opel Insignia, sourcing all production from Germany; alongside a first-ever liftback sedan, the Regal TourX was the first Buick station wagon in 22 years. After 2020, as the division shifted away from car model lines, Buick ended sales of the Regal in North America. First generation (1973-1977) Buick had been the first GM division to bring a personal luxury car to market with its 1963 Riviera, but was otherwise slow to react to the developing lower-priced mid-size personal luxury market, which Pontiac created with the 1969 Grand Prix and Chevrolet with the Monte Carlo the following year, 1970. At the same time, Oldsmobile added a formal notchback coupé to its intermediate line, the Cutlass Supreme, in 1970 and that model soon became Olds' best-selling intermediate. Buick did not get its own personal luxury coupe until the GM intermediates were redesigned in 1973, the so-called "Colonnade" cars that eliminated hardtop models completely. In a curious name swap, the Skylark name was dropped from Buick's intermediate line and instead the Century nameplate, last used in the 1950s, was revived