Subaru EK specs: 61.5 x 60 mm (2.4213 x 2.3622 in) bore and stroke. Displacement, compression and factory ratings for each, plus rod ratio and piston speed.
| Displacement | 21.7 ci |
|---|---|
| Cylinders | 2 |
| Bore | 2.421" |
| Stroke | 2.362" |
| Compression | 6.5:1 |
| Advertised power | 16 hp |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| EK31 | 21.7 ci | 2.4213" × 2.3622" | 6.5:1 | 16 |
This family is represented by a single engine in the database: 21.7 ci, 2 cylinders, a 2.4213" × 2.3622" bore and stroke.
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.