| 28.4.1991 | 300 km Road Atlanta | 1 | NPT-90 | Derek Daly | Nissan Performance Technology | DNS |
| 28.4.1991 | 300 km Road Atlanta | 84 | NPT-91 | Chip Robinson | Nissan Performance Technology | 2nd |
| 5.5.1991 | 300 km Topeka | 1 | NPT-91 | Daly / Earl | Nissan Performance Technology | DNS |
| 5.5.1991 | 1000 km Fuji | 1 | R91CP | Hasemi / Olofsson | Nissan Motorsports | 2nd |
| 5.5.1991 | 1000 km Fuji | 1T | R91CP | Hasemi / Olofsson | Nissan Motorsports | T-car |
| 5.5.1991 | 1000 km Fuji | 23 | R91CP | Hoshino / Suzuki | Nissan Motorsports | 1st |
| 5.5.1991 | 1000 km Fuji | 25 | R91VP | Wada / Okada | Team Le Mans | DNF |
| 5.5.1991 | 1000 km Fuji | 27 | R91CK | Nakaya / Weidler / Danielsson | From A Racing | DNF |
| 5.5.1991 | 300 km Topeka | 83 | NPT-91 | Geoff Brabham | Nissan Performance Technology | 5th |
| 5.5.1991 | 300 km Topeka | 84 | NPT-91 | Chip Robinson | Nissan Performance Technology | 1st |
| 20.5.1991 | 300 km Mosport [GT] | 57 | 240SX | Reed Kryder | Kryderacing | 8th |
| 20.5.1991 | 300 km Mosport [GT] | 75 | 300ZX Turbo (Z32) | Steve Millen | Cunningham Racing | 4th |
| 20.5.1991 | 300 km Mosport [GT] | 76 | 300ZX Turbo | Jeremy Dale | Cunningham Racing | 2nd |
| 20.5.1991 | 300 km Mosport [GT] | 95 | 240SX | Bob Leitzinger | Leitzinger Racing | 22nd |
| 20.5.1991 | 300 km Mosport [GT] | 96 | 240SX | David Loring | Leitzinger Racing | 19th |
| 26.5.1991 | 2 h Lime Rock | 1 | NPT-91 | Daly / Earl | Nissan Performance Technology, Inc. | DNS |
| 26.5.1991 | Interserie Zeltweg | 21 | GTP ZX-T | René Herzog | Alucraft Racing Ltd. | DNF |
| 26.5.1991 | 2 h Lime Rock | 83 | NPT-91 | Geoff Brabham | Nissan Performance Technology, Inc. | 3rd |
| 26.5.1991 | 2 h Lime Rock | 84 | NPT-91 | Chip Robinson | Nissan Performance Technology, Inc. | 1st |
| 1.6.1991 | 1 h Mid-Ohio [GT] | 57 | 240SX | Reed Kryder | Kryderacing | 20th |
| 1.6.1991 | 1 h Mid-Ohio [GT] | 75 | 300ZX Turbo (Z32) | Steve Millen | Cunningham Racing | 28th |
| 1.6.1991 | 1 h Mid-Ohio [GT] | 76 | 300ZX Turbo | Jeremy Dale | Cunningham Racing | 1st |
| 1.6.1991 | 1 h Mid-Ohio [GT] | 95 | 240SX | Bob Leitzinger | Leitzinger Racing | 27th |
| 1.6.1991 | 1 h Mid-Ohio [GT] | 96 | 240SX | David Loring | Leitzinger Racing | 37th |
| 1.6.1991 | 1 h Mid-Ohio [GT] | 97 | 240SX | Butch Leitzinger | Leitzinger Racing | 6th |
| 2.6.1991 | 300 km Mid-Ohio | 1 | NPT-91 | Bob Earl | Nissan Performance Technology, Inc. | 22nd |
| 2.6.1991 | 300 km Mid-Ohio | 83 | NPT-91 | Geoff Brabham | Nissan Performance Technology, Inc. | 5th |
| 2.6.1991 | 300 km Mid-Ohio | 84 | NPT-91 | Chip Robinson | Nissan Performance Technology, Inc. | 6th |
| 15.6.1991 | New Orleans [GT] | 5 | 240Z | Butch Leitzinger | Leitzinger Racing | 9th |
| 15.6.1991 | New Orleans [GT] | 75 | 300ZX Turbo (Z32) | Steve Millen | Cunningham Racing | 2nd |
| 15.6.1991 | New Orleans [GT] | 76 | 300ZX Turbo | Jeremy Dale | Cunningham Racing | 4th |
| 15.6.1991 | New Orleans [GT] | 85 | 240SX | Don Reynolds | American Instrument | 13th |
| 15.6.1991 | New Orleans [GT] | 95 | 240SX | Bob Leitzinger | Leitzinger Racing | 7th |
| 15.6.1991 | New Orleans [GT] | 96 | 240SX | David Loring | Leitzinger Racing | 5th |
| 16.6.1991 | 2 h New Orleans | 83 | NPT-91 | Geoff Brabham | Nissan Performance Technology | 2nd |
| 16.6.1991 | 2 h New Orleans | 84 | NPT-91 | Chip Robinson | Nissan Performance Technology | 11th |
| 16.6.1991 | 24 h Nürburgring | 104 | Skyline | Kinoshita / Schoysman / Weber | Team Zexel | 16th |
| 16.6.1991 | 2 h New Orleans | | NPT-91 | Earl / Brabham / Robinson | Nissan Performance Technology | DNS |
| 30.6.1991 | 500 km Watkins Glen | 1 | NPT-91 | Derek Daly | Nissan Performance Technology | DNS |
| 30.6.1991 | 500 km Watkins Glen | 83 | NPT-91 | Geoff Brabham | Nissan Performance Technology | 2nd |
| 30.6.1991 | 500 km Watkins Glen | 84 | NPT-91 | Chip Robinson | Nissan Performance Technology | 3rd |
| 20.7.1991 | 1 h Laguna Seca [GT] | 75 | 300ZX Turbo (Z32) | Steve Millen | Cunningham Racing | 23rd |
| 20.7.1991 | 1 h Laguna Seca [GT] | 76 | 300ZX Turbo | Jeremy Dale | Cunningham Racing | 2nd |
| 20.7.1991 | 1 h Laguna Seca [GT] | 85 | 240SX | Don Reynolds | American Instrument | 14th |
| 20.7.1991 | 1 h Laguna Seca [GT] | 95 | 240SX | Bob Leitzinger | Leitzinger Racing | 21st |
| 20.7.1991 | 1 h Laguna Seca [GT] | 96 | 240SX | David Loring | Leitzinger Racing | 7th |
| 20.7.1991 | 1 h Laguna Seca [GT] | 97 | 240SX | Butch Leitzinger | Leitzinger Racing | DNA |
| 21.7.1991 | 500 mile Fuji | 1 | R91CP | Hasemi / Olofsson | Nissan Motorsports | DNF |
| 21.7.1991 | 300 km Laguna Seca | 1 | NPT-91 | Daly / Earl | Nissan Performance Technology | DNA |
| 21.7.1991 | 500 mile Fuji | 23 | R91CP | Hoshino / Suzuki | Nissan Motorsports | 2nd |
| 21.7.1991 | 500 mile Fuji | 25 | R91VP | Wada / Okada | Team Le Mans | DNF |
| 21.7.1991 | 500 mile Fuji | 27 | R91CK | Nakaya / Weidler | From A Racing (Nova) | 6th |
| 21.7.1991 | 300 km Laguna Seca | 83 | NPT-91 | Geoff Brabham | Nissan Performance Technology | 2nd |
| 21.7.1991 | 300 km Laguna Seca | 84 | NPT-91 | Chip Robinson | Nissan Performance Technology | 5th |
| 27.7.1991 | 500 km Kemora | 12 | Skyline GT-R | Mäkinen / Wiik | Ari Mäkinen | 7th |
| 28.7.1991 | Interserie Brands Hatch | 21 | GTP ZX-T | René Herzog | Alucraft Racing Team | DNA |
| 28.7.1991 | 1 h 30 min Portland [GT] | 75 | 300ZX Turbo (Z32) | Steve Millen | Cunningham Racing | 2nd |
| 28.7.1991 | 1 h 30 min Portland [GT] | 75T | 300ZX Turbo | Millen / Dale | Cunningham Racing | T-car |
| 28.7.1991 | 1 h 30 min Portland [GT] | 76 | 300ZX Turbo | Jeremy Dale | Cunningham Racing | 8th |
| 28.7.1991 | 300 km Portland | 83 | NPT-91 | Geoff Brabham | Nissan Performance Technology | 2nd |
| 28.7.1991 | 300 km Portland | 84 | NPT-91 | Chip Robinson | Nissan Performance Technology | 4th |
| 28.7.1991 | 1 h 30 min Portland [GT] | 95 | 240SX | Bob Leitzinger | Leitzinger Racing | 12th |
| 28.7.1991 | 1 h 30 min Portland [GT] | 96 | 240SX | David Loring | Leitzinger Racing | 9th |
| 28.7.1991 | 1 h 30 min Portland [GT] | 97 | 240SX | Butch Leitzinger | Leitzinger Racing | 11th |
| 4.8.1991 | 24 h Spa | 25 | Skyline GT-R | Olofsson / Hattori / Brabham | Team Zexel | 1st |
| 4.8.1991 | 24 h Spa | 46 | Skyline GT-R | O'Dor / Kinoshita / Schoysman | Team Zexel | 6th |
| 4.8.1991 | 24 h Spa | 47 | Skyline GT-R (BNR32) | Skovgaard / Skovgaard / Graversen | Team Zexel | 11th |
| 25.8.1991 | 300 km Road America | 1 | NPT-91 | Chip Robinson | Nissan Performance Technology | 2nd |
| 25.8.1991 | 1000 km Suzuka | 1 | R90CP | Hasemi / Olofsson | Nissan Motorsports | 3rd |
| 25.8.1991 | 1000 km Suzuka | 23 | R91CP | Hoshino / Suzuki | Nissan Motorsports | DNF |
| 25.8.1991 | 1000 km Suzuka | 25 | R91VP | Okada / Kageyama / Sandro Sala | Team Le Mans | DNF |
| 25.8.1991 | 1000 km Suzuka | 27 | R91CK | Nakaya / Weidler | From A Racing | 2nd |
| 25.8.1991 | 200 km Road America [GT] | 57 | 240SX | Reed Kryder | Kryderacing | 26th |
| 25.8.1991 | 200 km Road America [GT] | 75 | 300ZX Turbo (Z32) | Steve Millen | Cunningham Racing | 1st |
| 25.8.1991 | 200 km Road America [GT] | 76 | 300ZX Turbo | Jeremy Dale | Cunningham Racing | 13th |
| 25.8.1991 | 300 km Road America | 83 | NPT-91 | Geoff Brabham | Nissan Performance Technology | DNS |
| 25.8.1991 | 300 km Road America | 83T | NPT-91 | Derek Daly | Nissan Performance Technology | 16th |
| 25.8.1991 | 300 km Road America | 84 | NPT-91 | Bob Earl | Nissan Performance Technology | 5th |
| 25.8.1991 | 200 km Road America [GT] | 95 | 240SX | Bob Leitzinger | Leitzinger Racing | 10th |
| 25.8.1991 | 200 km Road America [GT] | 96 | 240SX | David Loring | Leitzinger Racing | 9th |
| 1.9.1991 | Road Atlanta [GT] | 57 | 240SX | Kryder / Del Vecchio | Kryderacing | 15th |
| 1.9.1991 | Road Atlanta [GT] | 75 | 300ZX Turbo (Z32) | Steve Millen | Cunningham Racing | 4th |
| 1.9.1991 | Road Atlanta [GT] | 76 | 300ZX Turbo | Jeremy Dale | Cunningham Racing | 13th |
| 1.9.1991 | Road Atlanta [GT] | 95 | 240SX | Bob Leitzinger | Leitzinger Racing | 8th |
| 1.9.1991 | Road Atlanta [GT] | 96 | 240SX | David Loring | Leitzinger Racing | 20th |
| 15.9.1991 | 500 km Sugo | 1 | R91CP | Hasemi / Olofsson | Nissan Motorsports | 3rd |
| 15.9.1991 | 500 km Sugo | 23 | R91CP | Hoshino / Suzuki | Nissan Motorsports | 11th |
| 15.9.1991 | 500 km Sugo | 25 | R91VP | Okada / Kageyama | Team Le Mans | 5th |
| 15.9.1991 | 500 km Sugo | 27 | R91CK | Nakaya / Weidler | From A Racing | 2nd |
| 22.9.1991 | 500 km Watkins Glen [GT] | 57 | 240SX | Reed Kryder | Kryderacing | 11th |
| 22.9.1991 | 500 km Watkins Glen [GT] | 75 | 300ZX Turbo (Z32) | Millen / Dale | Cunningham Racing | 1st |
| 22.9.1991 | 500 km Watkins Glen [GT] | 76 | 300ZX Turbo | Jeremy Dale | Cunningham Racing | DNA |
| 22.9.1991 | 500 km Watkins Glen [GT] | 95 | 240SX | Bob Leitzinger | Leitzinger Racing | 7th |
| 22.9.1991 | 500 km Watkins Glen [GT] | 96 | 240SX | David Loring | Leitzinger Racing | 6th |
| 28.9.1991 | Lime Rock [GT] | 57 | 240SX | Kryder / Del Vecchio | Kryderacing | 17th |
| 28.9.1991 | Lime Rock [GT] | 75 | 300ZX Turbo (Z32) | Steve Millen | Cunningham Racing | 1st |
| 28.9.1991 | Lime Rock [GT] | 76 | 300ZX Turbo | Jeremy Dale | Cunningham Racing | 10th |
| 28.9.1991 | Lime Rock [GT] | 95 | 240SX | Bob Leitzinger | Leitzinger Racing | 8th |
| 28.9.1991 | Lime Rock [GT] | 96 | 240SX | David Loring | Leitzinger Racing | 14th |
| 28.9.1991 | Lime Rock [GT] | 97 | 240SX | Butch Leitzinger | Leitzinger Racing | 9th |