The 1985 Australian Manufacturers' Championship was a CAMS sanctioned motor racing title for car manufacturers.^[1] It was the 15th manufacturers title to be awarded by CAMS and the 6th to carry the Australian Manufacturers' Championship name.^[2] All championship rounds were open to cars complying with Australian Touring Car regulations,^[1] which were based on FIA Group A rules.^[3]

The championship was contested concurrently with the 1985 Australian Endurance Championship over a five-round series with one race per round.^[4]

• Round 1, Better Brakes 300, Amaroo Park, New South Wales, 4 August
• Round 2, Pepsi 250, Oran Park, New South Wales, 18 August
• Round 3, Castrol 500, Sandown, Victoria, 15 September
• Round 4, James Hardie 1000, Mount Panorama Circuit, Bathurst, New South Wales, 6 October
• Round 5, Motorcraft 300, Surfers Paradise, Queensland, 27 October

Cars were grouped into three engine classes based on engine capacity:

• Up to 2000cc
• 2001 to 3000cc
• 3001 to 6000cc^[1]

Championship points were awarded on a multi scale system for outright places gained at each round:

• Scale A was applied to cars in the Up to 2000cc class
• Scale B was applied to cars in the 2001 to 3000cc class
• Scale C was applied to cars in the 3001 to 6000cc class

Points were awarded only for the highest scoring car from each manufacturer at each round.^[1]

Note: Only the top ten championship placing are shown in the above table.