Pontiac GM 3800 V6 specs: 3.799 x 3.402 in (96.5 x 86.4 mm) bore and stroke, shared by all 3 versions. Displacement, compression and factory ratings.
| Displacement | 231 ci |
|---|---|
| Cylinders | 6 |
| Bore | 3.799" |
| Stroke | 3.402" |
| Compression | 8.5–9.4:1 |
| Advertised power | 170–260 hp |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| GM 3800 V6 · 3.799" × 3.402" · 9.4:1 | 231 ci | 3.7992" × 3.4016" | 9.4:1 | 200 |
| GM 3800 V6 · 3.799" × 3.402" · 8.5:1 | 231 ci | 3.7992" × 3.4016" | 8.5:1 | 170–260 |
| L27 | 231 ci | 3.7992" × 3.4016" | 9:1 | 170 |
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.