| Race Title: | 4 Horas do Estoril |
| Track Map: | Estoril track map.svg |
| Series Long: | European Le Mans Series |
| Series Short: | ELMS |
| Venue: | Autódromo do Estoril |
| First Race: | 1977 |
| First Series Race: | 2014 |
| Last Race: | 2016 |
| Duration: | 4 hours |
| Most Wins Driver: | Jean-Christophe Boullion (2) |
| Most Wins Team: | Pescarolo Sport (3) |
| Most Wins Manufacturer: | Courage (2) |
The 4 Hours of Estoril was a sports car endurance race held at the Autódromo do Estoril in Estoril, on the Portuguese Riviera. The race was first held in 1977 as a round of the World Sportscar Championship. It was revived in 2001 for the European Le Mans Series as a 6-hour race, and continued until 2003 under the FIA Sportscar Championship. Between 2014 and 2016, the race was a part of the European Le Mans Series, in the format of 4 hours.
| Year | Overall Winner(s) | Entrant | Car | Distance/Duration | Race Title | Series | Report | |
|---|---|---|---|---|---|---|---|---|
| 1977 | 2 hours, 30 minutes | Prémio International da Costa do Sol | World Sportscar Championship (Group 6) | report | ||||
| 1978-2000: Not held | ||||||||
| 2001 | 1000km (1,000miles) | Estoril 1000 Kilometres | report | |||||
| 2002 | 2 hours, 30 minutes | FIA Sportscar Championship Estoril | report | |||||
| 2003 | 2 hours, 30 minutes | FIA Sportscar Championship Estoril | report | |||||
| 2004-2010: Not held | ||||||||
| 2011 | 6 hours | 6 Hours of Estoril | report | |||||
| 2012-2013: Not held | ||||||||
| 2014 | Oreca 03 Nissan VK45DE 4.5 L V8 | 4 hours | 4 Hours of Estoril | report | ||||
| 2015 |  Pierre Thiriet Ludovic Badey Nicolas Lapierre | Thiriet by TDS Racing | Oreca 05 Nissan VK45DE 4.5 L V8 | 4 hours | 4 Hours of Estoril | report | ||
| 2016 |  Simon DolanGiedo van der Garde Harry Tincknell |  G-Drive Racing | Gibson 015S Nissan VK45DE 4.5 L V8 | 4 hours | 4 Hours of Estoril | report | ||