Alonso said he believed the new Aston Martin “should be a good step forward”, pointing out that Ferrari took more pole positions than Red Bull in the final five races of last season.
“Even last year, even though the Red Bull cars were very dominant, the Ferraris matched their lap times in most of the qualifying and were faster than them, so the car should be fast enough,” he said.
However, he questioned Hamilton's claim that it was a “childhood dream” to drive for Ferrari, alluding to Hamilton's recent comments in which he said he wanted to spend the rest of his life with Mercedes.
“It wasn't his childhood dream 12 months ago, right? Or I think it was two months ago, because back then it was a different dream,” Alonso said.
The 42-year-old said he had “no contact” with Mercedes so far. He is being considered for Hamilton's seat next year by the former world champion, despite a difficult history with the German manufacturer when he was team-mate with Hamilton at McLaren-Mercedes in 2007.
Mercedes is also known to be considering promoting rising Italian star Andrea Kimi Antonelli, who made his F2 debut this year and is widely considered a candidate to be the next megastar.
Asked about his future, Alonso said: “I know my situation is unique.
“There are only three world champions on the grid, and the fast world champions may have been champions in the past who weren't that keen on speed. And I'm probably the only one who will be available in 2025. So I is in a good position.
“But at the same time, when I decide whether I want to continue racing in the future, my first and only discussion will be with Aston Martin. That is my only priority.”
“But I know that if we can't reach an agreement and I want to commit to racing in F1, I'm in a privileged position. Perhaps for other teams, the performance and commitment we saw last year I think it's fascinating.”