One of the more popular of Reliant vehicles is the Reliant 5cwt Supervan that is based around the Regal 3/25 Super and the Regal 3/30 models though there often appears to be confusion as to what type of Supervan it is. The Regal came in three Supervan guises, the Supervan, Supervan II and Supervan III.
Contrary to popular belief it is often assumed that the first Supervan was based on the Regal 3/25 with a slatted front end. This is not the case, the 5cwt van version of the Regal 3/25 was called just that, “Reliant 5-cwt van”. When the Regal 3/25 saloon received a front end restyle in 1965 it then became the Regal 3/25 Super whilst the old version (with slatted front end) became the standard version. As a result when the 5-cwt van was restyled on the Regal 3/25 Super in May 1966, that then became the Supervan. The Supervan was powered by a 598cc engine
The Supervan II arrived in September 1967 and was essentially the same as its predecessor (demonstrated in the Supervan and Supervan II brochures that virtually feature the same photographs) though was now fitted with a modified 598cc engine that featured changes to the cylinder head and exhaust manifold. This along with a new carburetor increased power from 24.5 to 26bhp.
In 1968 the Regal 3/25 became the Regal 3/30 when it was fitted with a new 701cc engine. As a result the van version now became the Supervan III. This now gave the van a top speed of around 70mph (113km/h) although there was also an optional lower ratio rear axle available providing a rtio of 4:375:1 instead of 5.14:1. In April 1969 a 21E version was also created that featured 21 additional extras. By 1970 sales of the Supervan III were higher than of its saloon counterpart and Reliant introduced a makeover to give the vans more of a “Scimitar look” by introducing black vinyl and production continued until 1973 when they were then replaced with a new 5-cwt van styled on the Reliant Robin.