He had therefore been off the course for almost three months before he ran again, this time against older horses, in the Irish Champion Stakes. Kinane held the colt up in last place before making his challenge in the straight. Azamour produced a powerful, sustained run (described by RTÉ as a "blistering flourish") to move past the entire field, catching Norse Dancer in the last strides and winning by half a length. The beaten horses included the Group One winners Powerscourt, Grey Swallow, Rakti and the odds-on favourite Doyen. On his final start of the season, Azamour returned to Newmarket's Rowley Mile course for the Champion Stakes. He was again held up, before making headway in the closing stages, but could never reach the lead, and finished third of the eleven runners, beaten three and a half lengths by Haafhd. Oxx was not particularly disappointed, explaining that the colt was unsuited by the soft ground. Oxx also stated that, unlike most of the Aga Khan's horses, Azamour would stay in training as a four-year-old and nominated the Tattersalls Gold Cup, Prince of Wales's Stakes and King George VI and Queen Elizabeth Stakes as his targets. As predicted, Azamour began his season in a strong renewal of the Tattersalls Gold Cup in which he took fourth place behind Grey Swallow, Bago and Ace. He was unable to find a clear run after Bago drifted across in the closing stages, and Kinane felt that he had been an unlucky loser. Azamour was then sent to Royal "Ascot". Because of redevelopments at Ascot Racecourse, all the course's fixtures were moved in 2005, with the Royal meeting taking place at York. Azamour was made 11/8 favourite for the Prince of Wales's Stakes, and justified his position by leading a furlong from the finish and beating Ace by one and a half lengths, with Elvstroem, Warrsan and Ouija Board among the also-rans. The King George VI and Queen Elizabeth Stakes, often regarded as Britain's most prestigious weight-for-age race was run at Newbury in 2003. Azamour was made 5/2 favourite in a field which included Bago, Grey Swallow, Doyen and several other major winners, although the absence of top-class three-year-olds was noticeable. Kinane held the colt up in last place before making "smooth" progress in the straight to take the lead inside the last quarter of a mile.