From the Factory Manual:

Manual Tranny
2WD N/T: 1.8L
2WD Turbo: 2.2L
4WD: 2.3L

Automatic Tranny: 6.1L

Transfer Case: 0.6L

1990 TSi AWD - Parked since I bought it (Jan24/03)
Had it out one day, and busted the trans.