Still, a number of Kadetts has been captured as trophies by the Red Army and available for study and reverse-engineering. This project was conducted by design bureaus formed as Soviet-German joint ventures under the Soviet Military Administration in Germany (SMAD). There were 11 of them in total. One in Berlin (reverse-engineered the engine and transmission. Another in Schwarzenberg worked on the steel body. The wooden-bodied station wagon was developed in Chemnitz. The vast majority of the personnel of these design bureaus were German specialists and craftsmen hired by the Military Administration. These design bureaus not only prepared the necessary blueprints and documentation, but also provided the wooden master model for the body. They even developed the new trim pieces which distinguished the Moskvitch from its Opel prototype, including hood emblems and hubcaps with a large "M" (for "Moskvitch"). However, the stamping dies and most of the tooling had to be produced in the USSR.
This range of engines was also used for later models of the Corsa/Nova, and the mid-sized Cavalier/Ascona. From May 1981, the 1.3 was also available with a three-speed automatic. The automatic was made available to the diesel in September 1982. One interesting version which first appeared in mid-1982 was the Kadett Pirsch, (for deer stalking, a stealthy form of hunting). In non-German-speaking countries it was generally marketed as the Kadett Off Road. This was a station wagon with rustic trim, fitted with a differential brake, reinforced suspension and more suitable tires, increased ground clearance, a skid plate, and shortened front fenders. In Sweden, a special postal Kadett ("Opel Kadett Post") was offered, fitted with a high roof (necessitating a unique and much taller windshield) and a sliding right-hand door, RHD, and the automatic transmission. This version was converted by Karosseriefabrik Voll (in German) in Würzburg, Germany. Voll also made a postal version of the Kadett E.
In March 2017, Groupe PSA agreed to buy Opel, its British sister brand Vauxhall and their European auto lending business from General Motors for US$2.2 billion. In return, General Motors will pay PSA US$3.2 billion for future European pension obligations and keep managing US$9.8 billion worth of plans for existing retirees. Furthermore, GM is responsible for paying about US$400 million annually for 15 years to fund the existing Great Britain and Germany pension plans.
Instead, it had the same front fascia as the Latin American Chevrolet Corsa, possibly because GM South Africa wanted the same front fascia as the sedan and pickup, as swapping with the European front fascia would have been expensive sawing and welding due to the Latin American Corsa's sharper headlights. This car was 2001 Semperit Irish Car of the Year in Ireland.
The GSi's engine mapping had been carried out by Opel tuning specialists Irmscher. A model with the 82 PS (60 kW) 1.4 L multi point fuel injected engine, which was otherwise mechanically identical to the GSi, also became available as the Nova SRi in the United Kingdom. In January 1988, a turbocharged version of the Isuzu diesel engine was introduced, with power increased to 67 PS (49 kW).