Cosworth RA
The RA is a 6.5-litre, naturally-aspirated V12 engine, commissioned by Adrian Newey, and designed, developed and produced by Cosworth for the Aston Martin Valkyrie sports car. The road-going engine is rated at 1,000 hp (746 kW; 1,014 PS) at 10,500 rpm, with a max torque figure of 740 N⋅m (546 lbf⋅ft) at 7,000 rpm, making it the most powerful naturally-aspirated engine ever fitted and used in a production road car. The engine also revs to a maximum of 11,100 rpm, and has a power density making 114.8 kW (156.1 PS; 153.9 hp) per litre.
| Cosworth RA | |
|---|---|
| Overview | |
| Manufacturer | Cosworth |
| Production | 2021–present |
| Layout | |
| Configuration | V12, naturally-aspirated, 65° cylinder angle |
| Displacement | 6.5 L (6,499 cc) |
| Cylinder bore | 98 mm (3.86 in) |
| Piston stroke | 71.8 mm (2.83 in) |
| Cylinder block material | Aluminum alloy |
| Cylinder head material | Aluminum alloy |
| Valvetrain | 48-valve, DOHC, four-valves per cylinder |
| Combustion | |
| Fuel system | Direct fuel injection |
| Oil system | Dry sump |
| Cooling system | water-cooled – twin-aluminium front radiators |
| Output | |
| Power output | 1,000 hp (746 kW) at 10,500 rpm |
| Torque output | 546 lb⋅ft (740 N⋅m) at 7,000 rpm |
| Dimensions | |
| Dry weight | 206 kg (454.2 lb) |
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