2005 Australian Performance Car Championship

[1] It was sanctioned by the Confederation of Australian Motor Sport as a National Championship with GT Performance Racing Pty Ltd. appointed as the Category Manager.

[2] Peter Floyd won the championship by 39 points driving a HSV GTS.

Garry Holt finished second with 2003 Australian GT Performance Car champion Mark King third.

[1] An additional 3 points were awarded to the driver setting the fastest qualifying time at each round.

[1] Note: Race 1 of Round 7 at Phillip island was stopped following a first lap collision between championship leader Peter Floyd and his teammate Trevor Sheumack.