| 1.4.1973 | Interserie Nürburgring 300 | 1 | 917/10 TC | Leo Kinnunen | Motorsportclub Stuttgart - Racing Team AAW | 2nd |
| 1.4.1973 | Interserie Nürburgring 300 | 2 | 917/10 TC | Willi Kauhsen | Willi Kauhsen Racing Team | 1st |
| 1.4.1973 | 4 h Le Mans | 3 | 908/02 | Christian Poirot | Christian Poirot | DNF |
| 1.4.1973 | 4 h Le Mans | 4 | 908/02 K Flunder | Ortega / Merello | Guillermo Ortega - Ecuador Marlboro | DNF |
| 1.4.1973 | Le Mans Test | 4 | 908/02 K Flunder | Guillermo Ortega | Guillermo Ortega - Ecuador Marlboro | 17th |
| 1.4.1973 | 4 h Le Mans | 5 | 908/02 K Flunder | Wicky / Cohen-Olivar / Mattli | André Wicky Racing Team | DNA |
| 1.4.1973 | Interserie Nürburgring 300 | 5 | 917/10 | Ernst Kraus | Boeri-Helmets-Racing-Team | 5th |
| 1.4.1973 | Interserie Nürburgring 300 | 6 | 917/10 TC | Georg Loos | GELO-Racing-Team | 6th |
| 1.4.1973 | Interserie Nürburgring 300 | 9 | 908/03 | Reinhold Jöst | Reinhold Jöst | 3rd |
| 1.4.1973 | 4 h Le Mans | 12 | 910 | Touroul / Rouget | Raymond Touroul | 2nd |
| 1.4.1973 | Le Mans Test | 12 | 910 | Raymond Touroul | Raymond Touroul | 14th |
| 1.4.1973 | Interserie Nürburgring 300 | 15 | 917/10 | | GELO-Racing-Team | DNA |
| 1.4.1973 | Interserie Nürburgring 300 | 16 | 917/10 TC | George Follmer | Rinzler Motorracing Inc. | 17th |
| 1.4.1973 | Interserie Nürburgring 300 | 23 | 910 | Hans Deffland | Formeltweam München | DNA |
| 1.4.1973 | Interserie Nürburgring 300 | 24 | 910 | Bernd Becker | Bernd Becker | 13th |
| 1.4.1973 | Le Mans Test | 34 | 911 Carrera RSR 2.8 | Quist / Krumm | Max Moritz Racing Team | 18th |
| 1.4.1973 | 4 h Le Mans | 34 | 911 Carrera RSR 2.8 | Quist / Zink | Max Moritz Racing Team | DNF |
| 1.4.1973 | Le Mans Test | 35 | 911 S | Mignot / Mauroy | Rene Mazzia | 24th |
| 1.4.1973 | 4 h Le Mans | 35 | 911 S | Mignot / Mauroy | Rene Mazzia | 11th |
| 1.4.1973 | 4 h Le Mans | 36 | 911 S | Selz / Vetsch | Heinz Schiller | 10th |
| 1.4.1973 | Le Mans Test | 36 | 911 S | Vetsch / Selz | Heinz Schiller | 25th |
| 1.4.1973 | Le Mans Test | 37 | 911 Carrera RSR | Zbinden / Sage | Jean Sage | 27th |
| 1.4.1973 | 4 h Le Mans | 37 | 911 Carrera RSR | Peter Zbinden | Jean Sage | DNS |
| 1.4.1973 | Le Mans Test | 38 | 911 ST | Guérin / Boucher / Jaunet | Louis Meznarie | 22nd |
| 1.4.1973 | 4 h Le Mans | 38 | 911 ST | Boucher / Jaunet / Guérin | Louis Meznarie | 12th |
| 1.4.1973 | 4 h Le Mans | 39 | 911 S | Carron / Aeschlimann | André Wicky Racing Team | DNF |
| 1.4.1973 | Le Mans Test | 39 | 911 S | Philippe Carron | André Wicky Racing Team | 28th |
| 1.4.1973 | Le Mans Test | 40 | 911 S | Greub / Égreteaud | Jean Egreteaud | 21st |
| 1.4.1973 | 4 h Le Mans | 40 | 911 S | Greub / Égreteaud | Porsche Club Romand | DNF |
| 1.4.1973 | Le Mans Test | 43 | 908/02 | Christian Poirot | Christian Poirot | 23rd |
| 1.4.1973 | 4 h Le Mans | 61 | 911 Carrera RSR 2.8 | Schurti / Koinigg | Martini Racing Team | 4th |
| 1.4.1973 | Le Mans Test | 61 | 911 Carrera RSR 2.8 | Herbert Müller | Martini Racing Team | 4th |
| 1.4.1973 | Le Mans Test | 62 | 911 Carrera RSR | van Lennep / Müller | Martini Racing Team | 5th |
| 1.4.1973 | 4 h Le Mans | 62 | 911 Carrera RSR | van Lennep / Müller | Martini Racing Team | 1st |
| 1.4.1973 | Le Mans Test | 63 | 911 S | | Claude Buchet | DNA |
| 1.4.1973 | Le Mans Test | 64 | 911 Carrera RSR | | Porsche Kremer Racing Team | DNA |
| 1.4.1973 | 300 km Nürburgring | 110 | 911 Carrera RSR | John Fitzpatrick | Porsche Kremer Racing Team | DNF |
| 1.4.1973 | 300 km Nürburgring | 111 | 911 S | Paul Keller | Porsche Kremer Racing Team | 4th |
| 1.4.1973 | 300 km Nürburgring | 114 | 911 S | Peter Bernhard | Formel-Rennsport-Club | 15th |
| 1.4.1973 | 300 km Nürburgring | 115 | 911 Carrera RSR 2.8 | Claude Haldi | Porsche Club Romand | 2nd |
| 1.4.1973 | 300 km Nürburgring | 116 | 911 S | Holger Zeller | Holger Zeller | 5th |
| 1.4.1973 | 300 km Nürburgring | 117 | 911 | Horst Sasse | Horst Sasse | 10th |
| 1.4.1973 | 300 km Nürburgring | 120 | 911 Carrera RSR 2.8 | Günter Steckkönig | Manfred Weissmann Racing Speyer | DNF |
| 1.4.1973 | 300 km Nürburgring | 121 | 911 Carrera RSR 2.8 | Claude Ballot-Léna | Claude Ballot-Léna | 1st |
| 1.4.1973 | 300 km Nürburgring | 123 | 911 S | Kurt Simonsen | Team Kuberol Racing | 3rd |
| 1.4.1973 | 300 km Nürburgring | 130 | 911 Carrera RSR | Clemens Schickentanz | Oldernkott Tobacco and Pipes Racing | 16th |
| 1.4.1973 | 300 km Nürburgring | 141 | 914/6 | Günter Steckkönig | Günter Steckkönig | DNA |
| 1.4.1973 | 300 km Nürburgring | 142 | 911 S | Hans Hargarten | Hans Hargarten | 7th |
| 1.4.1973 | 300 km Nürburgring | 143 | 914/6 | Edgar Dören | Bergischer Motor Club e.V. im ADAC | 8th |
| 1.4.1973 | 300 km Nürburgring | 145 | 914/6 | Jean Canonica | Porsche Club Romand | DNA |
| 1.4.1973 | 300 km Nürburgring | 147 | 914/6 | Hans Christian Jürgensen | Hans Christian Jürgensen | DNA |
| 1.4.1973 | 300 km Nürburgring | 152 | 911 T | Franz-Josef Rieder | Franz-Josef Rieder | 9th |
| 1.4.1973 | 300 km Nürburgring | 153 | 911 | Peter Kuhlmann | Peter Kuhlmann | DNF |
| 1.4.1973 | 300 km Nürburgring | 154 | 914/6 | Lothar Ohren | Lothar Ohren | 17th |
| 8.4.1973 | SCCA National Virginia [BSR+CSR+CP] | 8 | 911 S | Jim Glanton | Jim Glanton | 2nd |
| 8.4.1973 | SCCA National Virginia [BSR+CSR+CP] | 58 | 911 | Fred Keyser | Fred L. Keyser | DNF |
| 8.4.1973 | Hockenheim [GT/T] | 101 | 911 Carrera RSR | Reinhardt Stenzel | Reinhardt Stenzel | DNA |
| 8.4.1973 | Hockenheim [GT/T] | 102 | 911 Carrera RSR 2.8 | Eberhard Sindel | Rallyegemeinschaft Ulm | 5th |
| 8.4.1973 | Hockenheim [GT/T] | 103 | 911 Carrera RSR | Helmut Henzler | Scuderia Lang Verpackungen | 3rd |
| 8.4.1973 | Hockenheim [GT/T] | 104 | 911 Carrera RSR 2.8 | Gerd Quist | Autohaus Max Moritz GmbH | 1st |
| 8.4.1973 | Hockenheim [GT/T] | 105 | 911 Carrera RSR 2.8 | Peter Bernhard | F R C | 4th |
| 8.4.1973 | Hockenheim [GT/T] | 106 | 911 S | Kurt Peter | Kurt Peter | DNA |
| 8.4.1973 | Hockenheim [GT/T] | 107 | 911 S | Hermann Schaffert | Herm. Schaffert | 6th |
| 8.4.1973 | Hockenheim [GT/T] | 108 | 911 Carrera RSR 2.8 | Günter Steckkönig | Manfred Weissmann Racing | 2nd |
| 8.4.1973 | Hockenheim [GT/T] | 109 | 911 Carrera RSR 2.8 | Eugen Kiemele | Eugen Kiemele | DNF |
| 8.4.1973 | Hockenheim [GT/T] | 121 | 911 | Manfred Laub | Autohaus Max Moritz GmbH | ?th |
| 8.4.1973 | Hockenheim [GT/T] | 122 | 911 | Albrecht Schütz | Albrecht Schütz | DNA |
| 8.4.1973 | Hockenheim [GT/T] | 123 | 911 | Paul Fromm | Paul Fromm | ?th |
| 8.4.1973 | Hockenheim [GT/T] | 124 | 911 T | Dieter Franke | Rallye- und Racing Gemeinschaft | DNF |
| 8.4.1973 | Hockenheim [GT/T] | 125 | 914/6 | Hans Christian Jürgensen | Hans Christian Jürgensen | DNF |
| 8.4.1973 | Hockenheim [GT/T] | 126 | 911 | Horst Klauke | Braun Sixtant Racingteam | DNA |
| 8.4.1973 | Hockenheim [GT/T] | 127 | 914/6 | "Ronald Knudel" | HMSTC | ?th |
| 8.4.1973 | Hockenheim [GT/T] | 128 | 911 S | Günther Scheck | Günther Scheck | DNA |
| 8.4.1973 | Hockenheim [GT/T] | 129 | 911 T | Peter Ehlert | Sixtant Racing Team | ?th |
| 8.4.1973 | Hockenheim [GT/T] | 130 | 914/6 | Peter Karl Nowak | Peter-Karl Nowak | ?th |
| 8.4.1973 | Zolder [GT] | 156 | 911 S | Robert Seymour | Robert Seymour | 4th |
| 8.4.1973 | Zolder [GT] | 166 | 911 | Martin Stein | Martin Stein | DNA |
| 8.4.1973 | Zolder [GT] | 167 | 911 S | Peter Stammeyer | Peter Stammeyer | 7th |
| 8.4.1973 | Zolder [GT] | 168 | 911 S | Harald Grohs | Harald Grohs | 1st |
| 8.4.1973 | Zolder [GT] | 169 | 911 T | Klaus Hartig | Klaus Hartig | DNF |
| 8.4.1973 | Zolder [GT] | 170 | 911 Carrera | John Rulon-Miller | Mannheim-Heidelberg Sport Touring Club | DNA |
| 8.4.1973 | Zolder [GT] | 171 | 911 S | Karl Heinz Schramm | Hubert Engbert | 3rd |
| 8.4.1973 | Zolder [GT/T] | 204 | 911 | Horst Klauke | Sixtant-Racing-Team | DNF |
| 8.4.1973 | Zolder [GT/T] | | 911 | Werner Christmann | Werner Christmann | DNF |
| 8.4.1973 | Zolder [GT/T] | | 914/6 | Karl-Heinz Schrey | Karl-Heinz Schrey | 1st |
| 15.4.1973 | Trans-Am Road Atlanta | 16 | 911 Carrera RSR | George Follmer | | DNA |
| 15.4.1973 | Trans-Am Road Atlanta | 66 | 911 S | Russ Norburn | | DNA |
| 15.4.1973 | Trans-Am Road Atlanta | 70 | 911 Carrera | Walt Maas | | DNA |
| 15.4.1973 | SCCA National Willow Springs | 91 | 906 | Harald Kirberg | | ?th |
| 15.4.1973 | 60 mile Zolder | | | Hugo Nückel | Hugo Nückel | DNF |
| 15.4.1973 | 60 mile Zolder | | | John Rulon-Miller | MHSTC | DNF |
| 15.4.1973 | 60 mile Zolder | | | Klaus Herig | VBA Berlin | ?th |
| 15.4.1973 | 60 mile Zolder | | | Werner Runkel | Scuderia Gedern | ?th |
| 15.4.1973 | 60 mile Zolder | | 911 S | Ernst Zupp | Ernst Zupp | ?th |
| 15.4.1973 | 60 mile Zolder | | | Dirk Hörnemann | Dirk Hörnemann | ?th |
| 15.4.1973 | 60 mile Zolder | | 914/6 | Hans Christian Jürgensen | Hans Christian Jürgensen | ?th |
| 15.4.1973 | 60 mile Zolder | | | Peter Sieben | Rheydter Club für Motorsport | DNF |
| 15.4.1973 | 60 mile Zolder | | 911 S | Gerhard Holup | Gerhard Holup | ?th |
| 15.4.1973 | 60 mile Zolder | | 911 Carrera RSR 2.8 | Eugen Kiemele | Eugen Kiemele | ?th |
| 15.4.1973 | 60 mile Zolder | | | Jean-Marc Guignard | | ?th |