Unless you are very lucky and come across a low mileage 156 that has been cared for very carefully and ideally garaged, buying a 156 is fraught with all sorts of calamities!
Certainly rust is an issue, even on the last production cars in 2005 floor pans could be missing all the underseal (mine is a 2005 and the rear floor pans had absolutely zero underseal, just paint).
I would also avoid the JTS engine (used in the facelift models from 2003). Alfa never got this engine right, the fuelling on this direct injection engine was always a right load of rubbish, just do a search on the forums and you can read all the issues for yourself.
Yes you could find a good 156 but they are going to be very rare.
Last edited by Spider95; 17-06-19 at 20:41.