The 114bhp 1.0-litre engine fires to a near-silent idle, and in general it’s responsive and keen. It revs willingly, and such is the quietness and consistency of output that there are times while cruising when you could be in any of, say, three gears and you wouldn’t notice much difference in either noise or throttle response. It drives as standard through a six-speed gearbox that is occasionally notchy but otherwise positive.
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).