The Buick Regal is a mid-size car

Mid-size car

A mid-size car is the North American/Australian standard for an automobile with a size equal to or greater than that of a compact...

 introduced by General Motors

General Motors

General Motors Company , commonly known as GM, formerly incorporated as General Motors Corporation, is an American multinational automotive corporation headquartered in Detroit, Michigan and the world's second-largest automaker in 2010...

 for the 1973 model year. North American production ended in 2004 and began again in 2011. For the 2011 model year, Buick

Buick

Buick is a premium brand of General Motors . Buick models are sold in the United States, Canada, Mexico, China, Taiwan, and Israel, with China being its largest market. Buick holds the distinction as the oldest active American make...

 re-introduced the Regal to the North American market, positioned as an upscale sport sedan. Production and sales in China have continued since 1999.

For certain model years between 1973 and 2004, the Regal shared bodies and powertrains with the similar Buick Century

Buick Century

Buick Century is the model name used by the Buick division of General Motors for a line of full-size performance vehicles from 1936 to 1942 and 1954 to 1958, and from 1973 to 2005 for a mid-size car....

.
Buick

Buick

Buick is a premium brand of General Motors . Buick models are sold in the United States, Canada, Mexico, China, Taiwan, and Israel, with China being its largest market. Buick holds the distinction as the oldest active American make...

 had been the first GM division to bring a personal luxury car

Personal luxury car

A personal luxury car is a highly styled, luxury vehicle with an emphasis on image over practicality. Accenting the comfort and satisfaction of its owner and driver above all else, the personal luxury car sometimes sacrifices passenger capacity, cargo room, and fuel economy in favor of style and...

 to market with its full-size 1963 Riviera

Buick Riviera

The Riviera by Buick is an automobile produced by Buick in the United States from the 1963 to 1999 model years, with 1,127,261 produced.A full-size coupé or personal luxury car, the early models of the Riviera in particular have been highly praised by automotive journalists and writers.A common...

 but was otherwise slow to react to the developing lower-priced mid-size personal luxury market, which Pontiac

Pontiac

Pontiac was an automobile brand that was established in 1926 as a companion make for General Motors' Oakland. Quickly overtaking its parent in popularity, it supplanted the Oakland brand entirely by 1933 and, for most of its life, became a companion make for Chevrolet. Pontiac was sold in the...

 created with the 1969 Grand Prix

Pontiac Grand Prix

Picking up where the Pontiac Ventura model left off, the Grand Prix first appeared in the Pontiac line for 1962. It was essentially a standard Pontiac Catalina coupe with minimal outside chrome trim and a sportier interior...

 and Chevrolet

Chevrolet

Chevrolet , also known as Chevy , is a brand of vehicle produced by General Motors Company . Founded by Louis Chevrolet and ousted GM founder William C. Durant on November 3, 1911, General Motors acquired Chevrolet in 1918...

 with the Monte Carlo

Chevrolet Monte Carlo

The Chevrolet Monte Carlo was an American-made two-door coupe introduced for model year 1970, and manufactured over six generations through model year 2007. It was marketed as a personal-luxury coupe through most of its history, with the last model version being classified as a full-sized coupe...

 the following year, 1970.