Being at the core of Opel’s design philosophy, sculptural design with a clear sense of precision also plays a major part in the interior design. Instrument panel and center stack are clearly structured and horizontally aligned to the driver. As the driver control center, the cockpit enhances the active driving feeling. An extensive engine portfolio ranging from gasoline to diesel and LPG that can be mated to manual and automatic transmissions is available to ensure good driving performance.
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).