The son of Clodovil was second on his only start last season and improved on that to win under Ryan Moore.
Moore was always in a handy position, tracking the pacesetter Persian Bolt.
He eased into the lead with three furlongs to run at Takreym was pushed out to score by seven lengths.
Roger said: "Takreym has been slow to come to hand this spring. He likes some cut in the ground and has done it well"