The Vauxhall Magnum is a car which was manufactured by Vauxhall from 1973 to 1978. First seen at the London Motor Show in October 1973, the Magnum was an HC Viva with a larger engine, more luxurious interior, higher trim level and four rather than two headlights. It shared its suspension and drive train with the larger-engined variants of the Vauxhall Viva and Firenza.