U.S. USA 1899 1900 U.S. M. V. Co. New York N. Y.
U.S. USA 1908 U.S. M. C. Co. Upper Sandusky O.
U.S. Long Distance USA 1900 1904 U.S. Long Distance Auto. Co. New York N. Y.
UAZ RUS 1942 now UAZ Ulianovskij Avtomobilnyj Zavod, Ulianovsk
UAZ 31512 (2002)
Ultima GB 1983 now Ultima Sports Ltd Leicester UK
Ultima GTR 640 (2005)
Ultimate USA 1920 n/a
Unic FR 1904 1939 Georges Richard, Puteaux
Unic Landaulette Taxi (1911)
Union USA 1902 1905 Union Auto. Co. Anderson Ind.
Union USA 1908 1909 Union Car. Co. St. Louis Miss.
Unipower GB 1966 1970 n/a
Unique GB 1916 The Motor Carrier and Cycle Co., Clapham, London
Unit/Silent Unit GB 1920 1923 Rotary Unit Co.Ltd., Woodburn, Buckinghamshire
United States USA 1899 1901 United States Auto. Co. Attleboro Mass.
Universal GB 1914 1916 Turner Motor Manufacturing Co.Ltd., Wolverhampton
Uno 001 / Catlin SWE 1988 1991 U. Johansson, Linköping (two prototypes)
Urecar GB 1923 Urecar Motor Co., Bournemouth, Hampshire
Upton USA 1904 1907 Upton M. Co. Lebanon Pa.
Upton USA 1909 1905 Upton Machinery Co. Beverley Mass.
Utile GB 1904 Utile Motor Manufacturing Co.Ltd., Kew, Surrey
Utility USA 1921 1922 Victor W. Page Motors Corp., Stamford Conn.
Utopian GB 1914 n/a