The England striker linked up with Jose Mourinho at the Italian side after becoming frustrated with a lack of opportunities at Chelsea and admits that the Portuguese coach was a key reason for his move to Serie A.
Abraham told reporters: "Why Italy? Good question. I had different options. So many clubs I was speaking to at the time. Italy came and I spoke to Jose. He had a goal.
"I could see where he wanted Roma to go and see where he wants to take them and I wanted to be part of the process. He really put his trust in me so he was a big impact on the reason why I chose Roma."
Abraham became an isolated figure at Chelsea after Thomas Tuchel took charge of the club in January and the player didn't want to take the "easy option".
He said: "I think the easy option would've been to stick around and sit down.
"Chelsea's a massive club, they will compete and try to win trophies so the easy option would've been to do that.
"I realised that I needed to go out and prove myself, I needed to play some games. I took a decision and it was the right one."
Abraham also revealed that Mourinho made a quip about the British weather as he looked to seal a deal for the striker.
He said: "The first thing he said to me was when I picked up the phone he was like, 'Do you want to enjoy some sun or stay in the rain?' I laughed.
"I think at first I did not think much of it when we were speaking. I think my mindset was that I wanted to be in the Premier League and I wanted to stay here.
"I feel like it was home, being around London, being around England. It was home. And I think I had to open my wings a bit and make a choice and I chose Italy and would not change it."