Bore, stroke, displacement and compression for all 10 Honda F-series engines, compared side by side. Plus rod ratio and head specs where published.
| Displacement | 131.6–137.5 ci |
|---|---|
| Cylinders | 4 |
| Bore | 3.346–3.386" |
| Stroke | 3.740–3.819" |
| Compression | 8.8–9.3:1 |
| Advertised power | 125–150 hp |
| Years | 1990–2002 |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| F23A | 137.5 ci | 3.3858" × 3.8189" | 9.3:1 | — |
| F23A5 | 137.5 ci | 3.3858" × 3.8189" | 8.8:1 | 135 |
| F23A1 | 137.5 ci | 3.3858" × 3.8189" | 9.3:1 | 150 |
| F22 | 131.6 ci | 3.3465" × 3.7402" | 8.8:1 | — |
| F22A1 | 131.6 ci | 3.3465" × 3.7402" | 8.8:1 | 125–135 |
| F22A4 | 131.6 ci | 3.3465" × 3.7402" | 8.8:1 | 130 |
| F22A6 | 131.6 ci | 3.3465" × 3.7402" | 8.8:1 | 140 |
| F22B2 | 131.6 ci | 3.3465" × 3.7402" | 8.8:1 | 130 |
| F22B1 | 131.6 ci | 3.3465" × 3.7402" | 8.8:1 | 145 |
| F22B6 | 131.6 ci | 3.3465" × 3.7402" | 8.8:1 | 140 |
Both bore and stroke vary across the family, so these are separate castings rather than variations on one block.
All are undersquare — stroke larger than bore, favouring torque low in the range.
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.