Hey bpowell555, thanks for the link
Since my registration says 10/2004, and it's the one with 220+ bhp, I suppose it's the "2.0 T 16V Petrol", at the top of the page. According to that, it's EuroIV. Please correct me if I'm wrong or verify if I'm right. However the registration also says --> "2001/100/CE-A", which supposedly means ( as I concluded from my internet search ) "EuroIII or better". The registration is Italian, if that means anything. Any more ideas? ... Thanks.