GMC 267ci specs: 3.50 x 3.484 in (88.9 x 88.5 mm) bore and stroke. Displacement, compression and factory ratings for each, plus rod ratio and piston speed.
| Displacement | 267 ci |
|---|---|
| Cylinders | 8 |
| Bore | 3.500" |
| Stroke | 3.484" |
| Compression | 8.3:1 |
| Years | 1979–1981 |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| L39 | 267 ci | 3.5" × 3.484" | 8.3:1 | — |
This family is represented by a single engine in the database: 267 ci, 8 cylinders, a 3.5" × 3.484" 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.