"This could be Ferrari's year," the French Canadian told the Italian media.
"The car is fast, although maybe it's a bit difficult to drive.
"Perhaps he will also have the support of Massa this year," he added.
The Maranello based team has produced a much better car for 2013, although currently the Ferraris are behind the Red Bulls and even Lotus' Kimi Raikkonen and Mercedes' Lewis Hamilton in the drivers' points standings.
Referring to Alonso's first-lap contact in Malaysia and the decision to stay out on track rather than pit for a new nose, Villeneuve said: "Ferrari has already done its big mistake for the year."