The 1985 Better Brakes 300 was an endurance race for Group A touring cars held at the Amaroo Park circuit in Sydney, New South Wales on 4 August 1985. The race was the opening round of the 1985 Australian Endurance Championship. It was held over 155 laps of the tight 1.94 km (1.20 mi) circuit for a total of 300.7 km (186 mi).
The field was divided into three classes according to engine displacement.
The race was won by the 1985 Australian Touring Car Champion Jim Richards driving his championship winning JPS Team BMW 635 CSi. Richards won the race by two laps from two more New Zealanders, Kent Baigent and Neal Lowe driving an ex-Schnitzer BMW 635 CSi, with Peter Brock in his Mobil Holden Dealer Team VK Commodore finishing third.
Colin Bond and Gregg Hansford finished 5th outright and 1st in Class B driving the Network Alfa Romeo GTV6 after a race long battle with the JPS BMW 323i of Tony Longhurst. Class C was won by the Team Toyota Australia Corolla of former open wheel star driver John Smith who also finished 7th outright.
One of the pre-race favourites, the Volvo 240T of Kiwi Robbie Francevic was out before the race started as the left front wheel parted company with the car on the formation lap going through Suttons Corner. Allan Grice, having his first ever Group A start driving in The Toy Shop Alfa GTV6, was out after just three laps with gearbox failure.
Richards qualified on pole for the race with a time of 53.80 seconds.
Results
* The event attracted 24 starters.