Interesting the differences in the numbers for the 2.0l. It seems the Alfa website and Alfa manuals do not agree, surprise, surprise. Although the website also states that cam drive is by chain so maybe those numbers are for the old twin cams by mistake.
I noticed that you had a "-" before the 3 degrees for inlet opening in your post. Does this mean "minus" i.e. inlet opens 3 deg AFTER TDC? This may sound strange but also on the website it states that the variator swings by 25 degrees so if full tilt is 22 deg before then no tilt would be 3 deg AFTER. Usually inlets open before TDC but when I was timing up my engine the inlet was still closed at TDC. This I thought was strange and hence the reason for the post in the first place but if we add up all the clues it would seem to be correct - inlet opens 3 deg AFTER TDC.
Many thanks for your help, looks like it's set up correctly after all.