Pontiac 287ci specs: 3.75 x 3.25 in (95.3 x 82.6 mm) bore and stroke. Displacement, compression and factory ratings for each, plus rod ratio and piston speed.
| Displacement | 287 ci |
|---|---|
| Cylinders | 8 |
| Bore | 3.750" |
| Stroke | 3.250" |
| Compression | 8.0:1 |
| Advertised power | 180–200 hp |
| Years | 1955 |
| Cylinder head data | 1 of 1 engines |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| Pontiac 287ci · 3.75" × 3.25" · 8:1 | 287 ci | 3.75" × 3.25" | 8:1 | 180–200 |
This family is represented by a single engine in the database: 287 ci, 8 cylinders, a 3.75" × 3.25" 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.