The Kadett C formed the basis o the Breetish Vauxhall Chevette, which haed a restyled front end an launcht wi a hatchback body, in addition tae uisin a 1256 cc OHV (ower-heid valve) Vauxhall ingine rather than the 1196 cc OHV Opel ingine. The Chevette made the Kadett C notable bi allouin it tae acome Opel's first hatchback — a version named Kadett City appeared in August 1975, based on the Chevette's hatchback body. The Kadett's coupé body style wis niver manufactured as a Chevette housomeivver. Awtho Kadett C production endit in 1979, the Chevette wis produced till Januar 1984. Unuisually for Vauxhall models, the Chevette wis importit tae Germany startin in 1979 tae satisfee the needs o the rear wheel drive traditionalists an wis quite a success for a year or twa. This import version, housomeivver wis niver offeecially badged as an Opel or a Vauxhall - bein named simply as 'Chevette'.
The engine came with a choice from two power levels. For the standard 1.0 litre engine maximum output was listed as 40 PS (29 kW) at 5,000 rpm, and in October 1963 the high compression "1.0 S-Motor" was added, sharing the 993 cc capacity of the original power unit, but offering a maximum 48 PS (35 kW) of power at 5,400 rpm. The more powerful "S-Motor" engine featured modifications to the inlet manifold, cylinders and camshaft along with a carburetor employing larger (36 mm (1.4 in) diameter than the 30 mm (1.2 in) used on the standard engine. This came with an 8.8: 1 compression ratio whereas the 40 PS (29 kW; 39 hp) engine used a compression ratio of only 7.8 : 1. Higher compression ratios for performance versions of standard engines were a growing trend in West Germany in the 1960s, led by Opel and Ford, and made possible by the growing availability of higher octane "Super" grade fuel at filling stations.
The Kadett D wis introduced in November 1979, goin on sale in the UK some five months afore the Breetish version, the Vauxhall Astra Mark 1, wis launcht in Aprile 1980. Aw models wur designed as three- or five-door hatchbacks an estates or station wagons. Thare wur an aa twa- an fower-door sedans, which uised the same bodyshells as the hatchbacks, but thir wur suin dropped. An aa dropt, in comparison tae the C Modell wis the Coupé.
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.