The 8 valve Audi engine is the same 115bhp unit as the MK3 and MK4 Golf engine. It's also used in the Skoda Octavia, Superb and Fabia.
I don't think it was ever used with a carb as the Audi 80 2.0E was injected (but don't quote me on that). The earlier 80 was available with carb (1.8S) or injection (1.8E) which was the Golf MK2 GTI engine.
The guy I sold my MK1 Golf GX to fitted the 2.0 115bhp from a Passat.