The Vauxhall Viva is a small family car that was produced by Vauxhall in a succession of three versions between 1963 and 1979. These were designated the HA, HB and HC series.

The C-segment is the 3rd category of the European segments for passenger cars and is described as "medium cars". It is equivalent to the Euro NCAP "small family car" size class, and the compact car category in the United States.