Pontiac 279ci specs: 3.661 x 3.307 in (93 x 84 mm) bore and stroke. Displacement, compression and factory ratings for each, plus rod ratio and piston speed.
| Displacement | 279 ci |
|---|---|
| Cylinders | 8 |
| Bore | 3.661" |
| Stroke | 3.307" |
| Compression | 10.0:1 |
| Advertised power | 275 hp |
| Years | 2004–2005 |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| LD8 | 279 ci | 3.6614" × 3.3071" | 10:1 | 275 |
This family is represented by a single engine in the database: 279 ci, 8 cylinders, a 3.6614" × 3.3071" 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.