also needs a cross-member which is bent as can be seen behind the broken bumper. can't remember if they are a bolt on item or welded, also bear in mind that the cross-member is pretty stong and as it is bent it may well have moved the mounting points, the chassis section ends. probably not not bad though, may not even need a slam panel but also noticed the bonnet is out of line on the o/s but that may not be too much of a problem. really for an x reg 156 is it worth the hassle? you have to weigh up if the work is worth it when you can get a straight one for around a grand (or less if you get a 1.6 or 1.8)
Autotrader - ALFA ROMEO 156 2.0 TS 16V S1 4dr Saloon
and it won't be classed as a write-off on the log book and worth less/put off potential buyers when you come to sell. only a cat d so not as bad but still shows up as a 'total loss' on the records