[2][3] The 300 was positioned against the Buick Roadmaster, Cadillac Series 61, Chrysler Saratoga, Frazier Manhattan and Lincoln Cosmopolitan.

[4] The car included the basic trim appointments found in the 200 and 200 Deluxe model lines and featured tinted windows, a robe rail for backseat passengers, and striped interior fabrics.

Exterior trim included full wheel covers and Packard's "Winged Goddess" cormorant hood ornament.

[2] Power for the car in both years came from Packard's venerable Super Eight engine, the 327-cubic-inch (5,360 cc) "Thunderbolt" inline eight, which was shared with the 250 line.

[6] For the 1955 model year, the Cavalier name was retired and the line was absorbed into the Packard Clipper Custom series.