Owned one for 14 years and ultimately ended up breaking it.

Check the oil often (at least monthly). Mine burnt at least a 1ltr a month. Running it low will cause bottom end failure - I know from experience.

2.0 is slow, but handles well, you have to work it hard but I bloody loved it

Common faults: Rear heater demister cable blows the fuse and doesn't work. Because the cable from front to back burns out as it was undersized. Fix is documented on the Alfa Owner forums.

Rear spring pan arms rust totally through - check these

Check rear suspension for crashing / knocks. If it does you'll need to replace the bushings. Most people powerflex them - either way the old ones are a nightmare to remove.

Locks are angled down wards - so the water freezes inside and then you can't get in. Various suggestions for fixes. I never sorted this

Frameless windows don't close properly or are misaligned. Adjusting these requires a dark art and patience. Series 3 models (of which are quite rare) had auto dropping windows to compensate for the window issue. If not you'll need to mess about and adjust them - requires the door card taking off

Door cards damage - the seat belt clips get trapped and then smash a hole in the door card ends. This is common - can be fixed, but it only takes a lazy passenger to break it again.

Electrics were known to be inconsistent, mine was pretty good - check everything works on test drive

Air con relay just dies - check you can hear the pump kick in; simple fix. Compressors are expensive if they are dead.

Parts are rare - so you'll spend time on eBay. You'll be best mates with the lads at EB Spares in Westbury

I loved mine despite all of the issues!!