The Flamengo striker is expected to complete his transfer by Wednesday this week.
"I want to make my mark in the history of this club. I can’t wait to get started; I’m champing at the bit and feel great. Rome is a fantastic city,” he told Il Romanista.
“You don’t know what it feels like for a player when the anthem plays in the Stadio Olimpico before kick-off and the crowd starts singing along.
“I can assure you that it gives goosebumps even to the opposition. The Roma fans are very moving.
Adriano’s first test in a Roma jersey will be the Italian Super Cup against Inter in August.
“I really want to do well straight away, but only for Roma and to prove that I am a true football player again.
“I have no particular ‘revenge’ to take on my ex-teammates or President Massimo Moratti, who has always treated me exceptionally well.”