See other engines in this family
Honda J30A specs: 3.0L (182.9 ci) 6-cylinder, 86 x 86 mm (3.3858 x 3.3858 in) bore and stroke, 10.5:1 compression. Rated 253-255 hp, 2005–2007.
The Honda J30A is exactly square — 3.3858" bore and 3.3858" stroke are the same — which splits the difference between a high-revving layout and a torque layout. The 3.3858" stroke does not reach 4,000 ft/min of mean piston speed until about 7,100 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 30.5 ci (500 cc).
10.5:1 on aluminum heads is in the range that usually runs on pump premium; aluminum sheds heat faster than iron, which makes the same number a little more forgiving.
It is one of 30 engines in the J-series V6 family, sitting between the 152.6 ci and 223.6 ci members. 3 factory variants share these dimensions, rated from 253 to 255 hp across 2005–2007.
| Displacement | 182.9 ci / 3 L |
|---|---|
| Bore | 3.3858" |
| Stroke | 3.3858" |
| Cylinders | 6 |
| Configuration | V6 |
| Compression ratio | 10.5:1 |
| Bore/stroke ratio | 1 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | SOHC |
| Fuel type | gas |
| Advertised HP | 253–255 hp |
| Years | 2005–2007 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2006 | J30A net | 253 @ 6000 | 232 lb-ft @ 5000 | 10.5:1 |
| 2007 | J30A net | 253 @ 6000 | 232 lb-ft @ 5000 | 10.5:1 |
Factory specification sheet.
| Bore/stroke character | 1.000 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,386 ft/min — conservative for a street engine |
| Displacement per cylinder | 30.5 ci |
| Static compression | 10.5:1 — in the range that usually runs on pump premium |
Each link opens the calculator with this engine's specs already filled in.
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|---|---|
| 2005 | 255 hp | J30A |
| 2006 | 253 hp | J30A |
| 2007 | 253 hp | J30A |
2 factory vehicles, 1997–2007. Each year opens that model's engine table.