Opel Ascona B Saloon 1975-81

2/4 door 5-seater saloon

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The second generation Opel Ascona B was presented in the 1975 Frankfurt Motor Show. It was available as a two or four-door sedan. There were related two and three-door coupé models in the Opel Manta range. There was no estate body.

The Ascona B retained the same engine range as its predecessor, although the 1.9 L was increased to 2.0 L in 1978, and versions with higher compression ratio and needing 98 octane gas, dubbed S, were available alongside the 90 octane models. The 2.0 E model had a Bosch L-Jetronic electronic fuel injection, and a 2.0 L diesel motor was added to the Ascona B range in 1978.  Engine range was larger than that of the Vauxhall Cavalier though not all engines were available in the UK

A version of the Ascona B, featuring the front end of the Manta B, was sold in South Africa as the Chevrolet Chevair. This was in addition to a Chevrolet Ascona, identical in most respects to the Opel.

Over 1.2 million Ascona B units were produced worldwide until 1981.

Opel Manta B 1975-1988

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The second car to use the Manta name was launched in August 1975. This two-door "three-box" car was mechanically based directly on the then newly redesigned Opel Ascona,.  The Manta had more "sporty" styling, including a droop-snoot nose not seen on the Ascona, although it was standard, on the UK version of the Ascona, the Vauxhall Cavalier. There was still no "Vauxhall Manta", with the car remaining an Opel in the UK. However, a Vauxhall Cavalier was available with the same coupé bodyshell. Engines where available ranging from the small 1,2 litre OHV engine, the 1,6 litre CIH and the 1,9 litre CIH. Also in 1976 the GT/E engine from the Manta A series was adapted into the Manta B programme spawning the GT/E Manta B series. In 1979 the GT/E had the engine replaced with the new 2,0 litre CIH and with a new designed Bosch L injection system. Power output was now 110 bhp (82 kW). The 1.9 litre engine gave way to the 2,0 litre S engine which was aspirated by a Varajet II carburettor. This engine was the most used engine by Opel at the time, and was to be found in several Opel Rekord cars.

In 1977, a three-door hatchback version appeared to complement the existing two-door booted car. This shape was also not unique, being available on the Vauxhall Cavalier Sports Hatch variant.

Both Manta versions received a facelift in 1982, which included a plastic front spoiler, sideskirts for the GT/E and GSi models, a small wing at the rear and quadruple air intakes on the grille. Also the 1.2, 1.6 and 1.9 litre engines were discontinued and replaced by the 1.3 litre OHC engine, the 1.8 litre OHC and the 2.0 litre S and E CIH engines. The GT/E was the model name for the UK where as in Europe it was badged the GSi. Production of the Manta continued well after the equivalent Ascona and Cavalier were replaced by a front wheel drive model "Ascona C". In 1982 the 1,8 litre OHC engine from the Ascona was fitted in the Manta B making a more economical Manta B to drive. It could run 14 km per litre and use unleaded fuel. The 1,8 was very popular and was in production for 5 years (1982-1987). The 2,0S models where discontinued in 1984 and only the GSi was available with the "large" engine. In 1986 Opel released the last Manta B model the Exclusive, giving it all of the best in equipment. Recaro seats with red cloth, grey leather like interior and the full bodypack known from the i200 models. This consisted of twin round headlights in a plastic cover, frontspoiler and rear lower spoiler from Irmscher, sideskirts and the known 3 split rear spoiler of the Manta 400 (producing 80 kg (176 lb) of weight on the rear at 200 km/h). Opel finally ceased the production of the Manta B in 1988, only producing the GSi exclusive the last 2 years. Sales continued in 1988 until the Manta was indirectly replaced by the Vauxhall Calibra though this car is front wheel drive not rear wheel drive.  The last Manta’s sold were called Manta Exclusives with special body kit and available in blue or silver.

 Opel Kadett C 1973-1979

 2/3/4-door 5-Seater Saloon/Hatchback/Estate/Coupe

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The Kadett C appeared in 1973 and was Opel's version of General Motors' "T-Car".

The Kadett C formed the basis of the British Vauxhall Chevette, which had a restyled front end and launched with a hatchback body, in addition to using a 1256 cc OHV (over-head valve) Vauxhall engine rather than the 1196 cc OHV Opel engine. The Chevette made the Kadett C notable by allowing it to become Opel's first hatchback — a version named Kadett City appeared in August 1975, based on the Chevette's hatchback body. Although Kadett C production ended in 1979, the Chevette was produced until January 1984. Unusually for Vauxhall models, the Chevette was imported to Germany starting in 1979 to satisfy the needs of the rear wheel drive traditionalists and was quite a success for a year or two.

The Kadett C today is a cult car in Germany, especially in fastback (coupé) form. The most sought after versions of the Kadett C Coupé are the Rallye and GT/E models. These models were built first with the Bosch fuel injected 1897 cc OHC (over-head cam) Opel engine, and followed by the updated 1998 cc OHC engine. Right-hand drive versions of these sports models are now rarely seen.

Included in the range from 1976 was very rare version, the Aero-Kadett, an open-top Kadett with targa roll bar, detachable roof insert and a separate convertible top aft of the roll bar. This car was built in very limited numbers by Karosserie Baur (Baur also produced convertible's for BMW) in Stuttgart. One clue concerning its rarity is the manufacturer's recommended retail price of DM 15,500.

The Kadett C reached the United States as the Buick–Opel. In reality, however, this was an Isuzu Gemini; an updated version of this car was marketed in the USA as the Isuzu I-Mark in the early 1980s.