The 1991 Tooheys 1000 was the 32nd running of the Bathurst 1000 touring car race. It was held on 6 October 1991 at the Mount Panorama Circuit just outside Bathurst. The 1000 km race was held for cars complying with the provisions of Australian Group 3A Touring Car regulations with the field divided into three engine capacity divisions. It was the Round 2 of both the 1991 Australian Endurance Championship and the 1991 Australian Manufacturers' Championship.
Nissan driver Mark Skaife became the first driver since Peter Brock in 1983 to claim provisional pole position, pole position after the Top 10 runoff (with a then fastest touring car lap time of 2:12.63), the race win, as well as setting the races fastest lap, though his lap record in the race was set in the teams #2 GT-R and not the #1 he drove to victory with Jim Richards (Brock's race record lap of 1983 was also set in the team's second, #25 car, but that was the car he drove to victory with John Harvey and Larry Perkins).
The Richards / Skaife Nissan GT-R cruised to a one lap victory from the Holden Racing Team VN Commodore SS Group A SV of defending champions Win Percy and Allan Grice with the GIO Racing Nissan GT-R of Mark Gibbs and dual Australian Drivers' Champion Rohan Onslow a further lap behind in 3rd place. After having won the Sandown 500 in the lead up to Bathurst, 3rd place was enough to see Gibbs and Onslow win the Australian Endurance Championship and help win Nissan their 4th Australian Manufacturers' Championship.