"The Audi 80 and the VW Santana were marketed through a joint sales channel, and as a result sales remained below Volkswagen's expectations"
-from Wikipedia.
Altogether some 3.5 million Santana, 2000, 3000 and Vista have been made in China since production started in 1985.
In comparison, only 198.505 were made in Europe.
Aside from 1.6 and 1.8 engines used in Chinese Santana, the European version was also available with 1.3 petrol, 1.9 petrol (later upgraded to 2.0 in 1984) and two 1.6 diesels (one naturally aspirated and another one turbocharged).