The 1975 Australian Tourist Trophy was a motor race staged at the Calder circuit in Victoria, Australia[1] on 25 May 1975.[2] The race was open to Production Sports Cars[1] and was recognized by the Confederation of Australian Motor Sport as an Australian national title race.[3] It was the thirteenth Australian Tourist Trophy and the first to be awarded since 1968.[3] The race, which was contested over two heats, was won by Peter Warren driving a Bolwell Nagari.[1]
The race was contested over two, 25 lap, 40 km heats.[4] Points were awarded on a 15-14-13-12-10-9-8-7-6-5-4-3-2-1 basis to the first fifteen finishers in each heat.[5]
The first heat was won by Peter Warren and the second by Steve Webb, both driving Bolwell Nagaris.[1] Warren and Paul Trevathan (MGB) finished equal on points after the two heats with Warren initially declared the winner and presented with the trophy.[1] The decision was then revised with Trevethan determined to be the winner, having finished higher in the second heat.[1] Warren lodged a successful protest based on his faster combined heat times, as per the race regulations.[1]
| Position | Driver | No. | Car | Entrant | H1 Pos. | H2 Pos. | Points | |
| 1 | Peter Warren | 38 | Bolwell Nagari | Peter Warren | 1 | 6 | 25 | |
| 2 | Paul Trevethan | 20 | MGB | Broadwalk MG Centre | 5 | 2 | 25 | |
| 3 | Wayne Myer | 5 | Datsun 240Z | Wayne Myer | 8 | 3 | 21 | |
| 4 | Phil George | 9 | Datsun 260Z | Phil George | 4 | 8 | 20 | |
| 5 | Col Matheson | 54 | Datsun SR311 | Col Matheson | 3 | 10 | 19 | |
| 6 | Gay Cesario | 15 | Fiat Spider | Gay Cesario | 10 | 4 | 18 | |
| 7 | Steve Webb | 2 | Bolwell Nagari | Steve Webb | DNS | 1 | 15 | |
| 7 | John Latham | 11 | MG Midget | John Latham | ? | 5 | 15 | |
| 7 | Dennis Watt | 4 | Lotus Elan | Dennis Watt | 6 | 11 | 15 | |
| 10 | Rex Colliver | 47 | Lotus 47 | Rex Colliver Motors | 2 | DNF | 14 | |
| 11 | Doug Seath | 31 | Bolwell Mark 7 | Doug Seath | ? | 9 | 12 | |
| 12 | Reg Byrne | 61 | MGB | Reg Byrne | ? | 7 | 9 | |
| 12 | Peter Woodward | 46 | Lotus 47 | Peter Woodward | 7 | DNF | 9 | |
| 14 | Robert Lawrenson | 37 | MG Midget | Robert Lawrenson | 9 | ? | 7 | |
| 15 | Geoff Dennis | 39 | Triumph Spitfire | Geoff Dennis | ? | ? | 6 | |
| 16 | Mike Holloway | 29 | Austin Sprite | Mike Holloway | ? | ? | 4 | |
| 17 | Neal Swingler | 25 | Triumph Spitfire | Neal Swingler | ? | ? | 3 | |
| 18 | Bernie Bisseling | 77 | Coopeys Garage | ? | ? | 2 | ||
| 19 | John Baragwanath | 16 | MGB | John Baragwanath | ? | ? | 1 | |
| - | Ian McDonald | 22 | Morgan | Morgan Sports Car Distributors | ? | ? | - | |
| - | Chris Roberts | 36 | Lotus Elan | Chris Roberts | DNF | ? | - | |
| - | Tim Trevor | 64 | MG Midget | Tim Trevor Motors | ? | ? | - | |
| - | Peter Tobin | 26 | Datsun 260Z | Auto Developments | ? | ? | - | |
| - | Ken Price | 99 | MG Midget | Broadwalk MG Centre | ? | ? | - | |
| - | Bob Kennedy | 60 | Triumph TR5 | Ecurie Triumph | ? | ? | - | |
| - | Charles Paine | 21 | Triumph GT6 | Broadwalk MG Centre | DNS | ? | - | |
| - | Peter Beasley | 19 | Peter Manton Motors | DNS | ? | - | ||
| - | Warwick Henderson | 12 | Chevrolet Corvette | Warwick Henderson | DNS | DNS | - |