Power was initially from 2.0 L 8-valve (115 bhp) and 16-valve fuel-injected (156 bhp) four-cylinder engines. In 1992 a turbocharged 2.0 L engine (204 bhp) (a turbocharged version of the X20XE) was added to the range. With four-wheel drive, a six-speed Getrag manual transmission and a claimed top speed of 240 km/h (150 mph), this flagship model finally gave the Calibra the dynamics to match its looks.
Competitive pricing led to commercial success, and Kadetts continued to be produced during the early months of the war: by the time production ended in May 1940, following intensification of World War II, 106,608 of these Opel Kadetts[6] had come off the assembly line at Opel's Rüsselsheim plant, which had been the first major car plant in Germany to apply the assembly-line production techniques pioneered by Henry Ford. 

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.
One of the most versatile small German military vehicles, the Kettenkrad, a blend of a tractor and a motorcycle, was powered with a 1.4 L Olympia four-cylinder engine. Produced by NSU, it had motorcycle-type front-wheel steering for gentle turns and negotiated tight corners with brakes on the propelling caterpillar tracks. The Kettenkrad towed antitank guns and transported troops and signal gear in several theatres of war. NSU continued to make it after the war for use in mines and forests. It was one of the few vehicles that could do jobs formerly performed by horses for which, owing to the shortage of oats, even less fuel was available than for motor vehicles.
All four tyres had to be of the same make and model, and all four tyres had to be replaced at the same time — if one tyre was damaged or punctured, the three remaining good tyres also had to be replaced. In addition there were other maintenance requirements which were both exacting and unusual. Neglect of these points through ignorance or a misconceived attempt to save money was common, and was likely to lead to very expensive failures of the transfer gearbox.[11]
^ Heinz Michaels (24 August 1962). "Opel bläst zum Angriff auf VW: Mit tausend "Kadetten" pro Tag – Ein neues Firmen jahrhundert, eine neue Fabrik, ein neuer Wagen: ....In der letzten Hauptversammlung hatte der Vorstand alle Versuche, die hausväterisch wieder angesammelten Reserven anzugreifen, gerade deshalb entschlossen abgewiesen. Mahnend sagte Prof. Nordhoff damals: "Hinter beiden Unternehmen (General Motors und Ford) steht eine Finanzkraft, der kein deutsches Unternehmen etwas auch nur annähernd Gleichwertiges entgegenzusetzen hat, und der Wille des Eindringens in den deutschen Markt um jeden Preis scheint vorhanden zu sein.""". ZEIT ONLINE. Retrieved 2013-05-12.
Styling wise, the Corsa OPC/VXR get more aggressive body kits with new bumpers, aluminium frames for the fog lights, a small scoop in the hood, a big roof spoiler and twin pipe Remus exhaust with a diffuser. Inside, the Recaro performance seats take centre stage, with other upgrades including the flat bottomed leather steering wheel, OPC gear knob and sports pedals along, as well as OPC design instruments.[53]

The Kadett C was introduced in Brazil as the Chevrolet Chevette. The three-door station wagon was called the Chevrolet Marajó, and a pick-up was named Chevy 500. Brazilian production commenced in 1973, with the Marajó being added in 1980 and the Chevy 500 in 1983, shortly after a significant facelift affected the entire line. Brazilian cars had engines in various combinations of size - 1.0 (1992-1993), 1.4 (1973-1982), or 1.6 (1982-1995) liters - and fuels (gasoline or ethanol), though not all combinations were available for all body configurations. The last Marajó was built in 1989, the last Chevette in 1993, and the last Chevy 500 in 1995.[27]
One resource that did not appear on the books of General Motors or on the rolls of the occupying authorities was most responsible for the recovery of Opel in 1945, the collaborative nature of its workers. They were not itinerant hires who had looked on their work at Rüsselsheim as just another job.[citation needed] They were men and women who had, for the most part, come from that immediate area, many from the country, and had literally grown up with the Adam Opel AG. The fate of Opel was important to its workers, for its collapse would mean the loss of the most important employer for the people of Rüsselsheim, who were finding their way home from the chaos of war.
The smallest Opel in the current line-up replaces the Suzuki co-developed Agila with a Chevrolet Spark twin. Which is convenient since the Chevy brand is now defunct in Europe. The LPG-powered Karl (also known as the Vauxhall Viva in the UK) uses the same petrol engine as all the non-LPG variants (in fact, the line-up comprises one unit altogether), offering 75 PS of power and 95 Nm of torque from a displacement of 999 cm3. Which means the smallest Opel is poised to face the Skoda Citigo, which is also offered in autogas guise in some markets, including Poland.
This new category, Group A, featured very stringent homologation requirements. In order to qualify for competition, the competing model needed to be produced at least 25,000 times. Furthermore, the FIA required ten percent of these cars to be a specialty model, with another 500 allowed as “Evolution” models. If the 25,000 car limit had not yet been met, the new model had to attain a production number of at least 5000 units a year.
Strangely, the joint-venture was announced several years ago. Then, just as the Crossland X and C3 Aircross hit showrooms, PSA decided to buy GM Europe – the company that owns Vauxhall. So this pair are a preview of a future strategy in which all Vauxhalls, Peugeots, Citroens and DSs will draw from shared engineering, like the VW Group’s brands have done for years.

^ General Motors Austria Gesellschaft m.b.H. (GMA, founded 1963 as sales organisation; from 1979: Administration, Non-productive Departments an Sales) and General Motors Austria Werke Gesellschaft m.b.H. (GMAW founded 1979; Production). In November 1987 GMAW (Austrian Handelsregister, HRB 24.436) were merged into GMA (HRB 20.133b, actual Firmenbuch FN 110500a).
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