Cosworth GPV8

The GPV8 is a 3.5-litre and 3.8-litre, naturally-aspirated V8 engine, originally designed, developed and produced by Cosworth, for the Lotus T125 open-wheel sports car. The initial 3.5-litre V8 produced 640 hp (477 kW; 649 PS) at 9800 rpm, and 332 lb⋅ft (450 N⋅m) at 7600 rpm. The rev limit of the engine is 10,300 rpm; and can be temporarily raised to 10,800 rpm with a push-to-pass button feature.^[5][6] The enlarged 3.8-litre V8 is more powerful, producing 675 hp (503 kW; 684 PS) at 9600 rpm, and 361 lb⋅ft (489 N⋅m) at 7600 rpm, with a redline of 10,000 rpm.^[7][8][9] The engine's power density is between 136.3 kW (185.3 PS; 182.8 hp) and 132.4 kW (180.0 PS; 177.6 hp) per litre.

Cosworth GPV8[1]
Overview
Manufacturer	Cosworth
Production	2010–present
Layout
Configuration	V8, naturally-aspirated, 90° cylinder angle
Displacement	3.5–3.8 L (214–232 cu in)
Cylinder bore	Undisclosed
Cylinder block material	Aluminum alloy
Cylinder head material	Aluminum alloy
Valvetrain	32-valve, DOHC, four-valves per cylinder
Combustion
Turbocharger	No
Fuel system	Direct fuel injection
Management	Pectel SQ6 ECU[2][3][4]
Fuel type	98-octane unleaded Gasoline
Oil system	Dry sump
Output
Power output	640–675 hp (477–503 kW)
Torque output	332–361 lb⋅ft (450–489 N⋅m)
Dimensions
Dry weight	297 lb (135 kg)

Unlike formula cars, the engine has been manufactured for durability, longevity, and reliability, with the engine able to withstand more than 5,000 km (3,107 mi) on premium 98-octane pump gas.^[8]

Applications

• Lotus T125