From the beginning, Lexingtons, like most other Indiana-built automobiles, were assembled cars, built with components from many different suppliers.

In 1910, a group of Connersville businessmen noted the community had too much tied up in the buggy and carriage industry, which was being displaced by the growing use of the automobile.

In 1918, Lexington autos featured hardtop enclosures made by the Rex Manufacturing Company, also of Connersville.

Also in 1918, the newly formed Ansted Engineering Company acquired Teetor-Harley Motor Corporation of Hagerstown, Indiana.

In 1919, the 85,306 sq ft (7,925 m2) Ansted Engine building was erected just north of the Lexington plant and extended to 21st Street.

Two short-wheelbase race cars with the powerful Ansted engine were built by Lexington for the 1920 Pikes Peak hill climb.

The Penrose trophy is on display at the Fayette County Historical Museum on Vine Street, Connersville Indiana.

The formation of the United States Automotive Corporation was announced by President Frank B. Ansted at the New York Auto Show on January 12, 1920.

On December 16, 1921, William C. Durant, founder of General Motors and former GM president, ordered 30,000 Ansted engines for his new Durant Six being built in Muncie, Indiana, by Durant Motors, Inc. Late in 1921, Alanson Partridge Brush (designer of the Brush Runabout and consulting engineer to General Motors) sued the company, alleging the Ansted engine infringed a number of his patents.

[1] The post-World War I recession of the early twenties hurt the Lexington Motor Car Company and United States Automotive Corporation.

[5] For 1919, new enclosed bodies were marketed with names like Coupelet, Sedanette, and Salon Sedan all with six-cylinder engines and a 122 in (3099 mm) wheelbase.