|Designer(s)||Pat Symonds (Executive Engineer)|
Bob Bell (Technical Director)
James Allison (Deputy Technical Director)
Tim Densham (Chief Designer)
Martin Tolliday (Project Leader)
Tad Czapski (Technology Director)
Dino Toso (Head of Aerodynamics)
|Length||4,600 mm (181 in)|
|Width||1,800 mm (71 in)|
|Height||950 mm (37 in)|
|Axle track||1,450 mm (57 in) (front)|
1,400 mm (55 in) (rear)
|Wheelbase||3,100 mm (122 in)|
|Engine||Mecachrome-built Renault RS25 3.0 L (183 cu in) V10 72° naturally aspirated, mid engined, longitudinally-mounted|
|Transmission||Renault 6-speed sequential semi-automatic gearbox|
|Power||900-950 hp (671-708 kW) @ 19,000 RPM|
|Weight||605 kg (1,334 lb) with driver, camera and ballast|
|Notable entrants||Mild Seven Renault F1 Team|
|Notable drivers||5. Fernando Alonso|
6. Giancarlo Fisichella
|Debut||2005 Australian Grand Prix|
|Teams' Championships||1 (2005)|
|Constructors' Championships||1 (2005)|
|Drivers' Championships||1 (2005, Fernando Alonso)|
The Renault R25 was the Formula One car entered by Renault in the 2005 season. The chassis was designed by Bob Bell, James Allison, Tim Densham and Dino Toso with Pat Symonds overseeing the design and production of the car as Executive Director of Engineering and Bernard Dudot leading the engine design. The car won both the Drivers' and Constructors' Championships in 2005, the first titles for any car racing with a French licence since the Matra MS80's triumph in 1969.
During the season, the car turned out to be slower than the McLaren MP4-20 at numerous points, with the win tally being 8-10. Reliability and consistency prevailed in the end, with Fernando Alonso and Giancarlo Fisichella taking the car to the last win and titles for a V10 powered Formula One car, marking the end of an era.
This car also claimed Michelin's first (and also second-to-last) title since its return in Formula One, winning the title again with Renault (the R26 2006-spec car) in the 2006 season, the last for the French tyre maker. The R25 was the first Constructors' Championship winning car since 1991 not to have been designed by either Adrian Newey or Rory Byrne.
Over 19 races, it scored 191 points, 8 wins, 15 podiums and was fully out of the points just twice in 18 starts (not counting the United States Grand Prix where both Renault drivers, in common with all their fellow Michelin tyre runners, withdrew prior to starting).
The R25 was also the last Renault Formula One car to use a 6-speed gearbox before the switch to a mandatory 7-speed gearbox in the following season.
On 11 December 2020 Alonso drove the car for the first time in 15 years, hours before the start of the first practice session shown on Sky Sports, and after the qualifying session for the 2020 Abu Dhabi Grand Prix. The car used Pirelli demo slick tyres, rather than the original Michelin grooved tyres.
(key) (results in bold indicate pole position; races in italics indicate fastest laps)