2005 Australian Performance Car Championship

The 2005 Australian Performance Car Championship was an Australian motor sport competition for Performance Cars. 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. It was the first time that the Australian Performance Car Championship name had been used, although similar titles had been run in the two previous years as the Australian GT Performance Car Championship.

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.

Calendar
The championship was contested over a seven round series with three races per round.

Points system
Points were awarded on a 30-24-20-18-17-16-15-14-13-12-11-10-9-8-7-6-5-4-3-2-1 basis to the first 21 classified finishers in each race. An additional 3 points were awarded to the driver setting the fastest qualifying time at each round.

Results
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. No points were awarded for this race and the points awarded for Race 2 and Race 3 were adjusted to compensate.