I've just swapped the 318iS (which had no MOT/cracked windscreen and rust in the roof) for this 1996 Mk3 VW Golf TD.
its got the 1.9 TD AAZ lump- mechanical fuel pump with no intercooler.
Stock rated at 75bhp/110ft/lb torque, but that can be increased
all the specs can be found here
Volkswagen Golf Umwelt 1.9 CL, 1991 Typ 330 (A3) technical specifications 25454
but quick synopsis is:
1022kg/2253lbs
Cd 0.30
Frontal area 2.03m2
Cda 0.61
Its going to get some 195/50/15's fitted, a full service then a full tank to baseline it.
from the 55l tank and 5 speed manual, I'll be aiming for 500 miles to start
The EPA fuel economy for the 1.9TD Jetta (closest model in America) is 34/44 with combined 38.
UK seems to be about mid 50's on a run, 40+ round town.
We'll see!
now to get used to 4 cyl turbos that dont like to rev, and drive the wrong wheels!