In 1957 Opel Product Director Karl Stief was mandated by General Motors headquarters in Detroit to develop "the perfect Anti-Volkswagen" ("einen perfekten Anti-VW"). The development team was headed up by Stief, supported by Hans Mersheimer (car-body) and Werner K. Strobel (engine and running gear), under conditions of such secrecy that even now very little is known of the development history of the 1962 Kadett. It has been alleged that GM was trying to conceal a new technique of platform and design sharing between Opel and its British sister company Vauxhall, which released the strikingly similar Viva HA in 1963, a year after Opel introduced the Kadett. Over the subsequent two decades Opel and Vauxhall's ranges would rapidly converge as Vauxhall's design independence from Opel was eroded to the point where by 1985, Vauxhall's car range entirely consisted of rebadged Opel models.
The other reason for the B’s success had to do with GM: once again, after having failed to slow down the VW’s ascent with their 1960-1961 compacts, they were forced to take the small car market seriously. That led eventually to the Vega in 1971, but in the shorter term, it meant marketing the Opel as something other than with which to remodel the garage. Now the Kadett family, which included a new fastback coupe, sedans and wagon, was seen in front of the typical American garage: two Opels for the price of one Buick.
Opel (German pronunciation: [ˈoːpl̩]) is a German automobile manufacturer, a subsidiary of French automaker Groupe PSA since August 2017. From 1929 until 2017, Opel was owned by American automaker General Motors. Opel vehicles are sold in the United Kingdom under the Vauxhall brand. Some Opel vehicles are badge-engineered in Australasia under the Holden brand, and in North America and China under the Buick brand.
^ General Motors Austria Gesellschaft m.b.H. (GMA, founded 1963 as sales organisation; from 1979: Administration, Non-productive Departments an Sales) and General Motors Austria Werke Gesellschaft m.b.H. (GMAW founded 1979; Production). In November 1987 GMAW (Austrian Handelsregister, HRB 24.436) were merged into GMA (HRB 20.133b, actual Firmenbuch FN 110500a).