Toro Rosso STR4
Sébastien Bourdais driving the STR4 at the Spanish Grand Prix | |||||||||||
| Category | Formula One | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Constructor | Toro Rosso | ||||||||||
| Designer(s) | Adrian Newey (Chief Technical Officer) Geoff Willis (Technical Director) Rob Marshall (Chief Designer) Peter Prodromou (Head of Aerodynamics) | ||||||||||
| Predecessor | Toro Rosso STR3 | ||||||||||
| Successor | Toro Rosso STR5 | ||||||||||
| Technical specifications | |||||||||||
| Chassis | carbon-fibre and honeycomb composite structure | ||||||||||
| Suspension (front) | cast titanium uprights, pushrods, carbon-fibre upper and lower wishbones | ||||||||||
| Suspension (rear) | cast titanium uprights, pullrods, carbon-fibre upper and lower wishbones | ||||||||||
| Engine | Ferrari 056 (2008-spec) 2398cc V8 18,000 RPM Limited | ||||||||||
| Transmission | 7-speed sequential | ||||||||||
| Fuel | Shell | ||||||||||
| Tyres | Bridgestone | ||||||||||
| Competition history | |||||||||||
| Notable entrants | Scuderia Toro Rosso | ||||||||||
| Notable drivers | 11. Sébastien Bourdais 11. Jaime Alguersuari 12. Sébastien Buemi | ||||||||||
| Debut | 2009 Australian Grand Prix | ||||||||||
| Last event | 2009 Abu Dhabi Grand Prix | ||||||||||
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The Toro Rosso STR4 was a Formula One car which Scuderia Toro Rosso used in the 2009 Formula One season. The car was revealed to be a Red Bull RB5 with a 2008-spec Ferrari 056 engine in Barcelona on March 9, 2009. It was revealed before the testing session.
The Toro Rosso STR4 was the last-ever Toro Rosso car to be built by its senior sister team Red Bull Racing, as from the 2010 season onwards Toro Rosso switched to in-house designed cars.