The Alvis TA 21, sometimes called the 3-Litre, is an automobile which was produced by Alvis Cars between 1950 and 1953. It was the first all new Alvis to be produced after World War II. The car was available in four-door Saloon and Tickford drophead versions. 302 dropheads were made. The centre section of the body was carried over from the earlier TA 14 with minor changes but the engine and luggage compartments were new and accounted for the extra length. The front doors remained rear hinged. Separate seats were fitted at the front and in the rear was a bench seat with fold down centre armrest. Leather trim was used. The saloon bodies were made for Alvis by Mulliners in Birmingham.