The Audi 100 and Audi 200 are executive cars manufactured for model years 1968–1994 by Audi, a division of the Volkswagen Group. The C3 model of the Audi 100 was sold in the United States as the Audi 5000 until 1988.

The restyled C2 Audi 100 was launched in 1976, with an in-line five-cylinder engine. It was initially a 100 PS (74 kW) engine offering "six-cylinder power and four-cylinder economy", and later upgraded to 136 PS (100 kW).

The Coupé was discontinued, but a five-door hatchback model, the 100 Avant, was launched in August 1977 as part of this generation. The mainstay of the range remained the four-door sedan model. A two-door sedan version was offered, primarily on the domestic market, from February 1977, but by now there was little demand, even in Germany, for large two-door sedans: few of these two-door Audi 100 C2s were sold.

At the end of September 1977, the Audi 100 became the manufacturer's first model to reach a production level of 1,000,000 units. The millionth Audi 100 was a hatchback Audi 100 Avant assembled not at the company's main Ingolstadt plant but to the west, at the Neckarsulm factory which, since the demise of the mainstream volume models from the NSU range, had been concentrating on providing additional production capacity for the fast selling Audi range.

Engines available included:

• 1.6 L I-4, 85 PS (63 kW; 84 hp), carburetted (1976−1982)
• 2.0 L I-4, 115 PS (85 kW; 113 hp), carburetted (1976−1978)
• 1.9 L I-5, 100 PS (74 kW; 99 hp), carburetted (1980−1982)
• 2.1 L I-5, 115 PS (85 kW; 113 hp), carburetted (1978−1982)
• 2.1 L I-5, 136 PS (100 kW; 134 hp), fuel injection (1976−1982) (100 and 200)
• 2.1 L I-5, 170 PS (125 kW; 168 hp), fuel injection, turbo (1979−1982) (200 only)
• 2.0 L I-5 Diesel, 70 PS (51 kW; 69 hp), (1978−1982)

North America:

• 2.1 L I-5, 103 hp (77 kW; 104 PS), fuel injection (MY 1978−1983)
• 2.1 L I-5, 130 hp (97 kW; 132 PS), fuel injection, turbo (MY 1980−1983)
• 2.0 L I-5 Diesel, 67 hp (50 kW; 68 PS) (MY 1980−1983)
• 2.0 L I-5 Turbodiesel, 84 hp (63 kW; 85 PS) (MY 1983)

About 850.000 Audi 100/200 C2 were built, of which 133.512 were sold in the United States.