HPD LM-V8 engine
| HPD LM-V8 Acura/HPD LM-AR6 Acura AL7R | |
|---|---|
| [1] | |
| 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.[2][3][4]
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.[5]
Design
The LM-V8 was the first engine to be solely designed and developed by HPD in its facilities in Santa Clarita, California.[6] The engine is mated to a jointly developed HPD-Hewland 6-speed sequential with manual paddle-operated selection and breathes through a 40.7mm inlet restrictor.[7]
Achievements
American Le Mans Series Championships
| Year | Team | Chassis | Class |
|---|---|---|---|
| 2009 |  Lowe's Fernández Racing
|
Acura ARX-01B | LMP2 |
| 2010 |  Patrón Highcroft Racing
|
HPD ARX-01C | LMP |
| 2012 | Muscle Milk Pickett Racing
|
HPD ARX-03a | P1 |
| 2013 | Muscle Milk Pickett Racing
|
HPD ARX-03a | P1 |
Other Championships/Wins
| Year | Series/Event | Team | Chassis | Class | Note |
|---|---|---|---|---|---|
| 2010 | Le Mans Series |  RML
|
Lola B08/80 | LMP2 | 1st in 1000 km of Algarve |
| 2010 | 24 Hours of Le Mans | Strakka Racing
|
HPD ARX-01C | LMP2 | Qualified on class pole |
Applications
References
- ^ "HPDARX-01eSebring2011-MF19". mulsannescorner.com. Retrieved May 29, 2025.
- ^ "HPD LM-V8 Engine and ARX-LMP2 Chassis – Information, Specs". blog.hpd.honda.com. July 6, 2010. Archived from the original on December 7, 2024. Retrieved May 29, 2025.
- ^ "Honda Performance Development" (PDF). hondaracing-us.honda.com. Archived from the original (PDF) on November 12, 2024. Retrieved May 29, 2025.
- ^ "2007 Acura ARX-01a Specifications". Ultimatecarpage.com. Retrieved May 30, 2025.
- ^ Beer, Mark (March 17, 2007). "No.2 Audi wins Sebring 12 Hours". autosport.com. Retrieved May 30, 2025.
- ^ "The Acura Announcement". archive.dailysportscar.com. July 21, 2006. Retrieved May 30, 2025.
- ^ "Mulsanne's Corner: 2007-2011 Acura/HPD ARX-01a, b, c, d, e, & g". www.mulsannescorner.com. Retrieved May 30, 2025.
