The 1975 Australian Manufacturers' Championship was an Australian motor racing competition for Group C Touring Cars.[1] It was sanctioned by the Confederation of Australian Motor Sport as an Australian National Title [1] and was the fifth Australian Manufacturers' Championship.[2]
The championship was won by Holden from Ford and Mazda.[3]
The championship was contested over a five round series.[4]
| Rd. | Race name | Circuit | State | Date | Winning driver | Car | Report | |
| 1 | Chesterfield 250 [5] | Adelaide International Raceway | South Australia | 24 August | Colin Bond | Holden Torana SL/R 5000 L34 | ||
| 2 | Sandown 250 [6] | Sandown | Victoria | 14 September | Peter Brock | Holden Torana SL/R 5000 L34 | Report | |
| 3 | Hardie Ferodo 1000 | Mount Panorama, Bathurst | New South Wales | 6 October | Peter Brock | Holden Torana SL/R 5000 L34 | Report | |
| 4 | Rothmans 300 | Surfers Paradise | Queensland | 9 November | Allan Moffat | Ford XB Falcon GT | ||
| 5 | Phillip Island 500K | Phillip Island | Victoria | 23 November | Peter Brock | Holden Torana SL/R 5000 L34 | Report |
Each round was a single race of 250 km distance or greater, open to Group C Touring Cars.[1]
Cars competed in four classes based on engine capacity:[1]
For all rounds other than the Bathurst round, championship points were awarded on a 9-8-7-6-5-4-3-2-1 basis for the first nine places in each class.[1]
For the Bathurst round, championship points were awarded on an 18-16-14-12-10-8-6-4-2 basis for the first nine places in each class.[1]
Additional points were awarded at all rounds on a 4-3-2-1 basis for the first four outright places.[1]
Only the highest placed vehicle from each manufacturer was eligible to score points at any given round.[1]
| Position | Manufacturer | Car | Ade. | San. | Bat. | Sur. | Phi. | Total | |
| 1 | Holden | Holden LH Torana SLR5000 L34 | 13 | 13 | 22 | 11 | 13 | 72 | |
| 2 | Ford | Ford XB Falcon GT & Ford Escort Mk 1 RS2000 | 11 | 9 | 16 | 13 | 11 | 60 | |
| 3 | Mazda | Mazda RX-3 | 9 | 9 | 18 | 9 | 8 | 53 | |
| 4 | Leyland | Morris Cooper S | 9 | 9 | 18 | 9 | 6 | 51 | |
| 5 | Alfa Romeo | Alfa Romeo 2000 GTV | 9 | 3 | 18 | 9 | 8 | 47 | |
| 6 | Datsun | Datsun 240K, Datsun 260Z 2+2 & Datsun 1200 | 5 | 6 | 16 | - | 9 | 35 | |
| 7 | Honda | Honda Civic | 7 | 8 | 4 | 3 | 8 | 30 | |
| 8 | Toyota | Toyota Corolla | 3 | - | - | 5 | - | 8 | |
| Mercedes-Benz | Mercedes-Benz 280E | - | 3 | - | - | 5 | 8 | ||
| BMW | BMW 2002Ti | - | - | - | 8 | - | 8 |
Note: Only models which contributed to a manufacturer’s points total are shown in the above table.