The field was divided into three classes according to engine displacement.
Class A : 3001cc to 6000cc
Class B : 2001cc to 3000cc
Class C : Up to 2000cc
The event was Round 3 of both the 1985 Australian Endurance Championship and the 1985 Australian Manufacturers' Championship. There were 36 starters of whom 18 were classified as finishers. Results are given below.
Australian Motor Racing Year, 1985/86
James Hardie 1000, 1985/86
Official Programme, Castrol 500, September 14 and 15, 1985