As the war progressed, military authorities placed greater stress on the development of air-cooled engines, which they felt had more immunity to damage from weather, shellfire, and misuse. To meet this demand, Opel engineers developed an unusual variation on normal cooling for the 3.6 L truck engine. It was called "air-oil cooling", and used engine oil to take heat away from the jackets around the cylinder barrels. The heads were directly cooled by air, there being three separate aluminium finned heads, each serving two cylinders. Of this interesting engine, which developed 72 hp (54 kW; 73 PS) at 3,000 rpm on 74-octane fuel, only three examples were built.
The Corsa OPC features a sports chassis with Frequency Selective Damping (FSD) technology, which enables the damping forces to adapt to the frequency of the car to balance sportiness with comfort. The suspension is lowered by 10mm (0.39 in) compared to standard Corsa models, and the car also gets an optimised steering system with more direct and precise reactions. OPC also worked on the brakes, adding 308mm discs on the front axle.
Car sales statistics are from the following countries: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Great Britain, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland. Sources: Manufacturers, ANDC, JATO Dynamics.
Opel will already open the order books for two new electrified models in the first half of 2019 – for the battery electric version of the next Corsa, and for the Grandland X SUV as plug-in hybrid electric vehicle. “Opel is going electric!” said Opel CEO, Michael Lohscheller. “That is what we announced at the presentation of our PACE! strategic plan in November 2017, and now we are delivering.”
Alfred P. Sloan, Jr., and Charles Erwin Wilson ("Engine Charlie" Wilson), GM's president, were considering the options. Later in April, Sloan sought to resolve the differences of opinion with a position paper that he hoped would set up conditions for resuming control of Opel that would put at rest the doubts of GM's more conservative financial minds.
Opel campaigned the car extensively in motorsport too. The rally version was uncompetitive, but Opel eagerly waded into the 160mph traffic jam that was the International Touring Car Championship. The ITCC was created from the German DTM series, in which Opel had struggled. A rule change allowed Opel to use a new 480bhp V6 derived from the road car. The resultant four-wheel-drive monster carried Manuel Reuter to the 1996 ITCC driver's crown and Opel won the manufacturers' gong, beating Alfa Romeo and Mercedes-Benz. It was the Calibra's finest hour.
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).