The 2003 FIA Sportscar Championship Estoril was the first race for the 2003 FIA Sportscar Championship season held at Autódromo do Estoril and ran a distance of two hours, thirty minutes. It took place on April 13, 2003.[1]
Class winners in bold. Cars failing to complete 75% of winner's distance marked as Not Classified (NC).
| Pos | Class | No | Team | Drivers | Chassis | Tyre | Laps |
|---|---|---|---|---|---|---|---|
| Engine | |||||||
| 1 | SR1 | 16 |  Pescarolo Sport | Jean-Christophe Boullion Stéphane Sarrazin | Courage C60 | 68 | |
| Peugeot A32 3.2L Turbo V6 | |||||||
| 2 | SR1 | 5 |  RN Motorsport |  John Nielsen Hayanari Shimoda | DBA4 03S | 68 | |
| Zytek ZG348 3.4L V8 | |||||||
| 3 | SR1 | 1 |  Racing for Holland | Jan Lammers John Bosch | Dome S101 | 67 | |
| Judd GV4 4.0L V10 | |||||||
| 4 | SR1 | 8 |  Automotive Durango SRL | Michele Rugolo Leonardo Maddalena | Durango LMP1 | 65 | |
| Judd GV4 4.0L V10 | |||||||
| 5 | SR2 | 52 | Lucchini Engineering | Mirko Savoldi Piergiuseppe Peroni | Lucchini SR2002 | 64 | |
| Nissan (AER) VQL 3.0L V6 | |||||||
| 6 | SR1 | 2 | Racing for Holland | Beppe Gabbiani Felipe Ortiz | Dome S101 | 63 | |
| Judd GV4 4.0L V10 | |||||||
| 7 | SR2 | 55 | GP Racing | Fabio Mancini Gianni Collini Massimo Saccomanno | Lucchini SR2001 | 63 | |
| Alfa Romeo 3.0L V6 | |||||||
| 8 | SR2 | 54 | SCI | Paul Daniels Ranieri Randaccio | Lucchini SR2000 | 61 | |
| Alfa Romeo 3.0L V6 | |||||||
| 9 | SR1 | 12 | Gianfranco Trombetti | Alex Caffi Gianfranco Trombetti | Promec PJ119 | 46 | |
| Peugeot A32 3.2L Turbo V6 | |||||||
| 10 | SR2 | 61 | Team Jota | Sam Hignett John Stack | Pilbeam MP84 | 46 | |
| Nissan (AER) VQL 3.0L V6 | |||||||
| NC | SR2 | 99 | PiR Bruneau | Pierre Bruneau Marc Rostan | Pilbeam MP84 | 27 | |
| Nissan 3.0L V6 | |||||||
| DNF | SR1 | 6 | Taurus Sports Racing | Justin Keen Christian Vann | Lola B2K/10 | 0 | |
| Judd GV4 4.0L V10 |