If the cam belt is still in one piece, has the car got oil in it? My 2.0 TS was driving perfectly, and suddenly lost power with a bang, and rattled like crazy as I coasted to a stop...
It'd drunk all of it's oil in a really short time for some reason, which resulted in a broken conn rod and a new (well, second hand) engine
If it's something like that, I think you'd be looking at ~£1500 to get a decent reconditioned engine fitted (looking at AutoLusso's EBay shop
). I had a cheap 2nd hand engine fitted by a local (non-Alfa specialist) garage and the car has been rough as hell ever since