Audi 100 three-speed automatic transmission sourced from Volkswagen. The Audi 100 included a rough engine note that was described as unlikely to discourage buyers whose first car had been a Volkswagen and who aspired to drive a diesel powered (pre-turbo) Mercedes-Benz. The Ingolstadt production line was at full capacity, but supply fell short of demand that during the summer of 1970 an additional production line for Audi 100s was set up in Volkswagen's own Wolfsburg plant, which made it the first water-cooled car to be produced in Germany's (and by some criteria the world's) largest car plant. For the Swiss market, the
Audi 80 in the USA. The Audi 90 was an upmarket version of the Audi 80. The convertible variant was marketed as the Audi Cabriolet. Under Audi's platform numbering convention, the 80 is classified as a member of the "B-series" or "B platform" family of vehicles, with the four generations of 80 being numbered as B1, B2, B3 and B4; its replacement – the Audi A4 – continues this sequence with platform numbers B5 through to B9. Originally this numbering convention ran concurrently with that of the Volkswagen Passat, the first two generations of which were essentially badge engineered clones of the