Imperial was the Chrysler Corporation's luxury automobile brand between 1955 and 1975, with a brief reappearance in 1981 to 1983.
The Imperial name had been used since 1926, but was never a separate make, just the top-of-the-line Chrysler. However, in 1955, the company decided to spin Imperial off as its own make and division to better compete with its rivals, Lincoln and Cadillac. Imperial would see new body styles introduced every two to three years, all with V8 engines and automatic transmissions, as well as technologies that would filter down to Chrysler corporation's other models.

The 1956 models were similar, but had small tailfins, a larger engine displacement of 354 cu in (5.8 L) with 280 brake horsepower (209 kW), and a four-door Southampton hardtop sedan was added to the range. 10,268 were produced. With a wheelbase of 133.0 inches (3,378 mm), longer than the previous year's by 3.0 inches (76 mm), they had the longest wheelbase ever for an Imperial. This also contributed to an increase in their overall length to 229.6 inches (5,832 mm), making them the longest non-limousine post WWII American cars until the advent of the Imperials of the "Fuselage Look" era.

On April 28, 1955, Chrysler and Philco had announced the development and production of the World's first all-transistor car radio. The all-transistor car radio Mopar model 914HR, was developed and produced by Chrysler and Philco, and was an $150.00 "option" on the 1956 Imperial car models. Philco was the company, who had manufactured the all-transistor car radio Mopar model 914HR, starting in the fall of 1955 at its Sandusky Ohio plant, for the Chrysler corporation.