opel 10n

The Opel OHV family is a pushrod inline-four engine. It was the first all-new engine developed by Opel of Germany after World War II and was released in 1962. Versions were in use through 1993.
Vauxhall would also make use of a locally built version of the OHV engine for the Vauxhall Viva, the original intention being to simply convert every component from metric dimensions to imperial measurements. However development of the OHV would soon be separate from to that of Opel, one of the first changes being to increase the size from 993cc to 1057cc via a slightly bigger 74mm bore yet built with the same stroke as the Opel OHV with later bore increases to 78mm and 81mm producing the 1159cc and 1256cc engines that would also power the Bedford HA, Vauxhall Firenza, Vauxhall Chevette and Vauxhall Cavalier as well as the Holden Torana....