My friend has 505000km on his 1990 Jetta TD.
We're replacing the head (started a leak, got a few spare parts) and doing a timing belt job soon. The car was never beaten to death but it's was pushed hard daily. (hills, upper laurentians, 130km/h often) (Ste-Agathe-Mirabel, Mirabel-St-Hubert and Mirabel St-Faustin on a daily basis, minimum 150km/day)
If the engine are well maintained (preventive maintenance); they'll outlast a body or 2.
I've seen 652700km on a 1992 Jetta TD. Cause of death. Car crash.