"Along with the other signings we have made in the last two windows, he will greatly enhance our ability to compete with the top sides," Hughes said. "Emmanuel has been one of the top forwards in the Premier League since he arrived from France and we are delighted he has agreed to come and join us."

Adebayor won nothing at Arsenal since joining from Monaco more than three years ago. He is hopeful that will change, with City now bankrolled by a big-spending Abu Dhabi owner.

"This is a team, maybe in one year or two years, that will be one of the best in the world," the 2008 African player of the year said.

The 25-year-old Adebayor's transfer fee was reported to be about 25 million pounds ($41 million).

"His arrival is another clear indication that we are determined to augment the players we have here with the best of international talent," Hughes said. "He adds vital balance and power to our attack. He has everything a top forward needs. He is versatile, powerful, quick and agile on the ball."

Arsenal manager Arsene Wenger added: "I am sure he will give something special to Manchester City - we will miss him."