The Reliant Regal was born at the 1952 Earls Court Motor Show although production did not begin until 1953. It was a 3-wheeler powered by a 747cc engine derived from the Austin Seven unit. Body was aluminium panels over an ash frame and bolted to a steel box section chassis. From 1954 the MkII Regal was available now having four seats with an optional hardtop and also available as a van. With the MkIII from 1956 Reliant went into production of fibreglass bodywork, and the MkIII body was curvier and had a kidney-shaped grille. The MkV from 1959 was moulded as a complete car, rather than body plus hardtop, and the door shape had the window set into it rather than having a window frame on top of the door. Reliant revised the body of the MkVI 1960-62 enlarging the windscreen and giving it a brow over the rear window. This was the last Reliant (and maybe the last production car) to have a sidevalve engine. From 1962 the timber-framing stopped as the Regal 3/25 was given an all new monocoque fibreglass body with large windows. The Regal 3/25 also had a Ford Anglia-style reverse slope rear window. The name '3/25' came from it being a 3-wheeler with a new 25hp 600cc ohv aluminium engine. A Regal 3/25 Super arrived in 1965 as an upmarket model with a new narrow line grille. From 1969 the engine was enlarged to 700cc and 30bhp and was named 'Regal 3/30'. Van versions were called 'Reliant Supervan'. There was a 'Regal 21E' in 1967, so named because it had 21 extras fitted. In 1973 the Reliant Robin took over.