Bore, stroke, displacement and compression for all 10 Acura Honda J-series engines, compared side by side. Plus rod ratio and head specs where published.
| Displacement | 182.9–225.7 ci |
|---|---|
| Cylinders | 6 |
| Bore | 3.386–3.661" |
| Stroke | 3.386–3.661" |
| Compression | 9.4–11.2:1 |
| Advertised power | 200–300 hp |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| J37A | 225.7 ci | 3.6614" × 3.5709" | 11.2:1 | 300 |
| JNC1 | 213.1 ci | 3.5827" × 3.5236" | 10.5:1 | — |
| Honda J-series · 3.504" × 3.661" · 10:1 | 212.2 ci | 3.5039" × 3.6614" | 10:1 | 210–255 |
| Honda J-series · 3.504" × 3.661" · 11:1 | 212.2 ci | 3.5039" × 3.6614" | 11:1 | 265–286 |
| Honda J-series · 3.504" × 3.661" · 10.5:1 | 212.2 ci | 3.5039" × 3.6614" | 10.5:1 | 250–278 |
| J32A2 | 196 ci | 3.5039" × 3.3858" | 10.5:1 | 260 |
| J32A3 | 196 ci | 3.5039" × 3.3858" | 11:1 | 270 |
| J32A1 | 196 ci | 3.5039" × 3.3858" | 9.8:1 | 225 |
| Honda J-series · 3.386" × 3.386" · 10:1 | 182.9 ci | 3.3858" × 3.3858" | 10:1 | 240–244 |
| J30A1 | 182.9 ci | 3.3858" × 3.3858" | 9.4:1 | 200 |
Both bore and stroke vary across the family, so these are separate castings rather than variations on one block.
Compression spans 9.4:1 to 11.2:1, so fuel requirements differ meaningfully between members — worth checking before assuming parts interchange.
Each engine page carries rod ratio, mean piston speed, bore/stroke character and cylinder head specs where published, and links into the calculators with its dimensions already filled in.