1991 Sandown 500

The 1991 Don't Drink Drive Sandown 500 was an endurance race for Group 3A Touring Cars. The event was held on 8 September 1991 at the Sandown circuit in Victoria, Australia over 161 laps of the 3.10 km "long" circuit, totalling 499 km. The race was the first round of both the 1991 Australian Endurance Championship and the 1991 Australian Manufacturers' Championship.

The race was won by first time winners Mark Gibbs and Rohan Onslow and the Bob Forbes Racing team in just their second race since taking delivery of the team's new Gibson Motorsport developed Nissan Skyline GT-R. With six classified it was the smallest number of classified finishers in the history of the Sandown 500 touring car race.

Although no official Top 10 run off was held during qualifying for the Sandown 500, the top 10 qualifiers were:

1991 Australian Touring Car season

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