^ Jump up to: a b c Note: The powertrain plant Opel Wien GmbH in Aspern/Vienna (Austria) is not a subsidiary of Adam Opel AG but a first-tier subsidiary of General Motors Europe Limited (GME) (99.5%) and of GM AUTOMOTIVE UK (GMAUK) (0.5%), see "Opel Wien GmbH, FN 110500a". FirmenABC Marketing GmbH. Retrieved 3 April 2017. Both, GME and GMAUK, are located in Luton. GME Ltd. itself is a daughter company of GM CME Holdings CV, which is directly controlled by the General Motors Corporation (GMC), see "Name: GENERAL MOTORS EUROPE LIMITED, Company Number: 07556915". Company search, Made Simple Group Ltd. Retrieved 3 April 2017.
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).