The 1990 Australian Manufacturers' Championship was open to manufacturers of cars complying with CAMS Group 3A Touring car

Touring car

A touring car, or tourer, is an open car seating five or more. Touring cars may have two or four doors. Often, the belt line is lowered in the front doors to give the car a more sportive character. They were often fitted with a folding roof and side curtains. Engines on early models were either in...

 regulations and was contested over a four-round series.

Schedule

• Round 1, Sandown 500
  Sandown 500
  The Sandown 500 is an endurance motor race staged at the Sandown Raceway, near Melbourne in Victoria, Australia between 1964 and 2011. It was typically held in September, the month before Australia’s premier endurance race, the Bathurst 1000. The “500” was not run in 1966, 1967, 1999, 2000, 2008,...
  
  , Sandown Raceway
  Sandown Raceway
  Sandown International Raceway is a motor racing circuit in Melbourne, Victoria, approximately south east of the city centre. It is considered a power circuit with its front straight being 899m long and back straight 910m long.-History:...
  
  , Victoria, 9 September
• Round 2, Tooheys 1000
  1990 Tooheys 1000
  The 1990 Tooheys 1000 was the 31st running of the Bathurst 1000 touring car race. It was held on 30 September 1990 at the Mount Panorama Circuit just outside Bathurst, New South Wales, Australia. The event was open to cars eligible under CAMS Group 3A regulations, commonly known as Group A Touring...
  
  , Mount Panorama Circuit
  Mount Panorama Circuit
  Mount Panorama Circuit is a motor racing track located in Bathurst, New South Wales, Australia. It is the home of the Bathurst 12 Hour motor race, held each February, and the Bathurst 1000 motor race, held each October...
  
  , Bathurst, New South Wales
  Bathurst, New South Wales
  -CBD and suburbs:Bathurst's CBD is located on William, George, Howick, Russell, and Durham Streets. The CBD is approximately 25 hectares and surrounds two city blocks. Within this block layout is banking, government services, shopping centres, retail shops, a park* and monuments...
  
  , 30 September
• Round 3, Ansett Air Freight Challenge, Adelaide Parklands
  Adelaide Street Circuit
  The Adelaide Street Circuit is a temporary street circuit in the East Parklands adjacent to the central business district of the city of Adelaide in South Australia....
  
  , South Australia
  South Australia
  South Australia is a state of Australia in the southern central part of the country. It covers some of the most arid parts of the continent; with a total land area of , it is the fourth largest of Australia's six states and two territories.South Australia shares borders with all of the mainland...
  
  , 3 & 4 November
• Round 4, Nissan Sydney 500, Eastern Creek Raceway
  Eastern Creek Raceway
  Eastern Creek International Raceway is a motorsports circuit located on Brabham Drive, Eastern Creek , New South Wales, Australia, adjacent to the Western Sydney International Dragway. It was built and is owned by the New South Wales Government and is operated by the...
  
  , New South Wales, 10 November

Rounds were run concurrently with those of the 1990 Australian Endurance Championship

1990 Australian Endurance Championship

The 1990 Australian Endurance Championship was the seventh running of the Australian Endurance Championship. It began on 9 September 1990 at Sandown Raceway and ended on 3 November at the Eastern Creek Raceway after three rounds...

.

"Australian Motor Racing Year, 1990/91" suggests that the championship win was tied between Ford & Holden however both the CAMS Manual of Motor Sport (post 1990 editions) and www.camsmanual.com.au state that the title was awarded solely to the Ford Motor Company of Australia.