Rome is 9 hours ahead of Portland
Best overlap: 8:00 AM to 9:00 AM in Portland is 5:00 PM to 6:00 PM in Rome.
Shoot for 8:00 AM to 9:00 AM in Portland; your Rome colleagues will see that as 5:00 PM to 6:00 PM. With only around 1 hour of shared time, be precise — book 8:00 AM in Portland (5:00 PM in Rome) and you'll catch both teams.