During its lifetime, the Calibra was much more popular in Europe, and outsold its nearest rival, the Ford Probe, which was considered to be underpowered, and very American for most European drivers.[citation needed] However, in the United Kingdom, it failed to outsell the Rover 200 Coupé, which offered comparable performance, but without 4WD in the top of the range models.
Compared to the outgoing model, the new Corsa F is going to lose up to 10 percent of weight, translating into a curb weight of just 980 kilograms (2,160 pounds) for the five-door model in its lightest form. That’s up to 108 kg (239 lbs) less than the car it replaces, even though it will have roughly just about the same size. Speaking of which, Opel says the new Corsa will be 4.06 meters (159.8 inches) long.
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 Insignia flagship followed exactly the same initiative as the Astra. Once again the Opel engineers’ main objective was efficiency. Thanks to optimized packaging and lightweight materials they could save up to 175kg on the Insignia Grand Sport compared with its predecessor – much to the benefit of dynamics and fuel consumption. Depending on powertrain and equipment, the current Insignia Sports Tourer even weighs up to 200kg less than the similar model variant from the first generation.
According to the car's manufacturer's data, the Karl needs 4,9 l of LPG per 100 km of highway driving, 7,1 l/100 km in the city and 5,7 l/100 km on average. Just for comparion, when running on petrol it requires on average 4,6 l/100 km, but don't be fooled by the sheer figures since autogas is usually by approx. 50 percent cheaper than its conventional counterpart. Given the fuel economy figures and current fuel prices, the only kind of motor vehicle cheaper to run than a Karl LPGTEC would probably be... a moped. As for CO2 emissions, the autogas-powered pocket-sized Opel spews out 93 g/km, which is less than the special ECO version running on petrol, which emits 99 g/km.

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Sloan suggested that GM take the helm of Opel again for a two-year "probationary" period to see whether the economic conditions, then called "close to stagnation" in Germany, would improve. Sloan set other important goals: "General Motors should risk no additional capital in Opel. Credit facilities should be available. We should have complete freedom in personnel policies and administration. The products produced by Adam Opel AG should be solely within the jurisdiction of management, and if prices had to be approved by government authority, a reasonable return on the capital should be allowed."

The Kadett A (above) finally appeared in 1962, and was a classic GM/Opel effort: highly pragmatic, conventional in every respect, reasonably stylish for its time, and designed to deliver a good bang for the buck. In just about every way possible, it was the antithesis of the VW: front-engine rwd, a rather tinny but roomy body, highly tossable but with a primitive suspension and ride, a very roomy trunk, and excellent visibility as well as economy. Oh, and a proper heater even! Its little 987 cc OHV four made 40 net/46 gross hp, six more than the VW 1200. Its trim fighting weight of 1475 lbs (670 kg), some two hundred pounds less than the VW, showed in both its acceleration and body integrity.