HPD LM-V8 engine
| HPD LM-V8 engine Acura/HPD LM-AR6 engine Acura AL7R engine | |
|---|---|
| Overview | |
| Manufacturer | Honda Performance Development |
| Production | 2007-2013 |
| Layout | |
| Configuration | V8, naturally-aspirated, 90° cylinder angle |
| Displacement | 3.4 L (3,397 cc) |
| Cylinder bore | 93 mm (3.66 in) |
| Piston stroke | 62.5 mm (2.46 in) |
| Cylinder block material | Aluminium |
| Cylinder head material | Aluminium |
| Valvetrain | 32-valve (four-valves per cylinder), DOHC |
| RPM range | |
| Max. engine speed | 10,000 rpm |
| Combustion | |
| Fuel system | Gasoline direct injection |
| Management | Continental/Acura ECU |
| Fuel type | VP MS100 E10, 100-octane gasoline + 10% ethanol (ALMS) |
| Oil system | Dry sump |
| Cooling system | mechanically water cooled |
| Output | |
| Power output | 480 hp (358 kW; 487 PS) |
| Torque output | 450 N⋅m (332 lb⋅ft) |
The HPD LM-V8 engine (also called the Acura/HPD LM-AR6 and Acura AL7R) is a naturally aspirated, four-stroke, 3.4-liter, V8 racing engine, designed and produced by Honda Performance Development (HPD) for use in multiple Le Mans Prototype race cars, from 2007 to 2013.
In its debut race at the 2007 12 Hours of Sebring, Andretti Green Racing finished first in the LMP2 class and second overall in an Acura ARX-01a-Courage chassis.