Buick 225ci specs: 3.75 x 3.40 in (95.3 x 86.4 mm) bore and stroke. Displacement, compression and factory ratings for each, plus rod ratio and piston speed.
| Displacement | 225 ci |
|---|---|
| Cylinders | 6 |
| Bore | 3.750" |
| Stroke | 3.400" |
| Compression | 9.0:1 |
| Advertised power | 155–160 hp |
| Years | 1964–1967 |
| Cylinder head data | 1 of 1 engines |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| Buick 225ci · 3.750" × 3.400" · 9:1 | 225 ci | 3.75" × 3.4" | 9:1 | 155–160 |
This family is represented by a single engine in the database: 225 ci, 6 cylinders, a 3.75" × 3.4" bore and stroke.
All are oversquare — bore larger than stroke, which favours revs over low-end torque.
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.