Bore, stroke, displacement and compression for all 2 Acura Honda F-series engines, compared side by side. Plus rod ratio and head specs where published.
| Displacement | 121.9–132 ci |
|---|---|
| Cylinders | 4 |
| Bore | 3.425" |
| Stroke | 3.323–3.571" |
| Compression | 11.1–11.7:1 |
| Advertised power | 237–240 hp |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| F22C1 | 132 ci | 3.4252" × 3.5709" | 11.1:1 | 237 |
| F20C | 121.9 ci | 3.4252" × 3.3228" | 11.7:1 | 240 |
Every engine here shares a 3.4252" bore; displacement varies by stroke alone, which is the signature of a family built on one block with different cranks.
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.