ACE [1] (United States)

Ace Motor Corporation was an American automobile manufacturer based in Ypsilanti, Michigan, operational from 1920 to 1923. The company was established to produce a range of vehicles, with its first cars being delivered to a dealer in Seattle, Washington, in early 1920. These initial models were not available to the general public until later that year, following a pre-order in mid-1919.

The Ace vehicles were notable for their engines, which included designs by Herschell-Spillman and a unique rotary disc valve engine developed by engineers Fred Guy and O.W. Heintz. In 1921, the company expanded its offerings to include two six-cylinder models available on wheelbases of 117 inches (2970 mm) and 123 inches (3122 mm), along with a coupe variant added to the touring car lineup.

In its final year of production, 1923, Ace introduced a new four-cylinder series powered by a Gray engine, featuring a wheelbase of 114 inches (2893 mm). Additionally, they expanded their six-cylinder offerings with a model that had a wheelbase of 120 inches (3046 mm), which was three inches longer than previous models. The pricing for the Ace Four models ranged from $1,295 for the Pup touring car and Pup roadster to between $2,260 and $3,150 for other models. However, the coupe was discontinued in 1923, and production ceased that same year after an estimated total of 250 cars had been manufactured.