In 1957 Opel Product Director Karl Stief was mandated by General Motors headquarters in Detroit to develop "the perfect Anti-Volkswagen" ("einen perfekten Anti-VW"). The development team was headed up by Stief, supported by Hans Mersheimer (car-body) and Werner K. Strobel (engine and running gear), under conditions of such secrecy that even now very little is known of the development history of the 1962 Kadett. It has been alleged that GM was trying to conceal a new technique of platform and design sharing between Opel and its British sister company Vauxhall, which released the strikingly similar Viva HA in 1963, a year after Opel introduced the Kadett. Over the subsequent two decades Opel and Vauxhall's ranges would rapidly converge as Vauxhall's design independence from Opel was eroded to the point where by 1985, Vauxhall's car range entirely consisted of rebadged Opel models.

The new four-cylinder, oversquare one-litre water-cooled Opel OHV engine weighed only 96 kg and was the first all-new engine developed by Opel since before the war. The side-mounted camshaft was driven not through gear-cogs but using a single chain with a hydraulic tensioner, the valve train employing rocker-arms and light-weight hollow rods. The arrangement was low on weight and on friction, permitting engine speeds above 6,000 rpm. The pistons were formed from an aluminium-alloy and incorporated a bimetal expansion strip to ensure uniform thermal expansion. The three-bearing forged crankshaft was of more traditional construction. The carefully designed aluminium inlet manifold provided for efficient feed of the fuel-mixture to the cylinders and helped provide the engine with good fuel economy characteristics.

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.
Camera video pentru marșarier, disponibilă în versiunea standard sau panoramică la 180°, asigură o vizibilitate generală optimă, perspectivă panoramică și funcție zoom. Dispar pericolele invizibile de până acum, precum obiectele care se apropie din lateral sau traficul din spate, conducerea devenind mai simplă și mai sigură. Funcția zoom este activată automat dacă obiectele sunt mai aproape de 70 cm. Găsirea unui loc de parcare devine mult mai relaxantă, asistentul automat la parcare preluându-ți sarcina. Acesta te ajută să ieși din locul de parcare și să manevrezi în orice direcție fără a utiliza mâinile.
Later, an 1800 cc version wis introduced for the Kadett/Astra GTE model. This range o ingines wis an aa uised for later models o the Corsa/Nova, an the mid-sized Cavalier/Ascona. The Kadett D wis an' a' equipped wi a 1600 cc diesel ingine that wis possible tae drive as cheap as 5.0 L/100 km, an a cairy-ower 1196cc OHV ingine. It wis an aa produced as IDA Kadett in Kikinda, Yugoslavie.
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