The Coronet was a full-size car

Full-size car

A full-size car is a marketing term used in North America for an automobile larger than a mid-size car. In the United States, the EPA uses "large car" to denote full-size cars....

 from Dodge

Dodge

Dodge is a United States-based brand of automobiles, minivans, and sport utility vehicles, manufactured and marketed by Chrysler Group LLC in more than 60 different countries and territories worldwide....

 in the 1950s, initially the division's highest trim line but, starting in 1955, the lowest trim line. In the 1960s, the name was transferred to Dodge's mid-size entry.
The Dodge Coronet was introduced with the division's first postwar body styles. Lower trim lines were the Wayfarer and Meadowbrook. The only engine for Dodge was a 230 cubic inch flat-head straight six cylinder engine with a single barrel Stromberg carburetor, producing 103 hp (gross).