Ligier JS25
| Industry | Formula One racing car |
|---|---|
| Predecessor | Ligier JS23 |
| Founder | Michel Beaujon, Claude Galopin |
| Successor | Ligier JS27 |
| Products | Formula One car |
The Ligier JS25 was a Formula One vehicle engineered by Michel Beaujon and Claude Galopin for the Equipe Ligier squad competing in the 1985 Formula One season. Equipped with a turbocharged Renault V6 power unit, the car transitioned to Pirelli tyres following Michelin's exit from Grand Prix competition after 1984. The original driver lineup featured Andrea de Cesaris alongside Jacques Laffite, with Philippe Streiff taking over from de Cesaris mid-season due to several accidents.
Contributing to Ligier's accumulation of 23 points, the JS25 enabled the team to secure 6th place in the Constructors Championship. Laffite recorded two third-place finishes and achieved second at the final race in Australia, where Streiff also claimed a podium spot despite nearly colliding with Laffite on the penultimate lap. This incident caused damage to Streiff’s front wheel axle, yet he managed to hold his position.
A significant event during the year was de Cesaris's severe rollover crash at the Austrian Grand Prix. This prompted team principal Guy Ligier to replace him, as repair expenses became excessive despite Marlboro’s sponsorship backing. The near-collision between Streiff and Laffite in Australia almost compromised what became the team's best result of the season; however, both drivers ultimately reached the podium.
Streiff was not retained for the subsequent 1986 season, partly due to his risky maneuver in Australia. The JS25 was eventually succeeded by the Ligier JS27 in the following year.
Complete Formula One World Championship results
(key) (results shown in italics denote fastest lap)
| Year | Entrant | Engine | Tyres | Driver | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | Pts. | WCC |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Template:F1 | Équipe Ligier Gitanes | Renault Gordini EF4B V6 tc |
Template:Goodyear | BRA | POR | SMR | MON | CAN | DET | FRA | GBR | GER | AUT | NED | ITA | BEL | EUR | RSA | AUS | 23 | 6th | |
| Andrea de Cesaris | Ret | Ret | Ret | 4 | 14 | 10 | Ret | Ret | Ret | |||||||||||||
| Philippe Streiff | 10 | 9 | 8 | 3 | ||||||||||||||||||
| Jacques Laffite | 6 | Ret | Ret | 6 | 8 | 12 |
- Équipe Ligier abstained from participating in the 1985 South African Grand Prix due to global opposition against apartheid, aligning with sanctions endorsed by the French government.