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Honda J-series V6 specs: 3.7L (223.6 ci) 6-cylinder, 90 x 96 mm (3.5433 x 3.7795 in) bore and stroke, 11.2:1 compression. Rated 300-305 hp. SOHC.
The Honda J-series V6 is undersquare — the 3.7795" stroke exceeds the 3.5433" bore by 6.2% — a layout that trades peak RPM for leverage and torque low in the range. The 3.7795" stroke puts mean piston speed at 4,000 ft/min around 6,350 RPM, which is where a production bottom end is generally considered at its limit. Each of the 6 cylinders displaces 37.3 ci (611 cc).
11.2:1 on aluminum heads is high enough that pump premium or better is normally required.
It is one of 13 engines in the J-series V6 family, the largest at 223.6 ci. 2 factory variants share these dimensions, rated from 300 to 305 hp. Factory fitments include the Acura MDX, Acura TL, Acura TSX V6 and 1 other.
| Displacement | 223.6 ci / 3.7 L |
|---|---|
| Bore | 3.5433" |
| Stroke | 3.7795" |
| Cylinders | 6 |
| Compression ratio | 11.2:1 |
| Bore/stroke ratio | 0.938 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | SOHC |
| Fuel type | gas |
| Advertised HP | 300–305 hp |
| Bore/stroke character | 0.938 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,780 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 37.3 ci |
| Static compression | 11.2:1 — high enough that pump premium or better is normally required |
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 |
|---|---|---|
| — | 300 hp | J37A1 |
| — | 305 hp | J37A4, J37A2 |