Buick 340ci specs: 3.75 x 3.85 in (95.3 x 97.8 mm) bore and stroke, shared by all 2 versions. Displacement, compression and factory ratings, plus rod ratio.
| Displacement | 340 ci |
|---|---|
| Cylinders | 8 |
| Bore | 3.750" |
| Stroke | 3.850" |
| Compression | 9.0–10.3:1 |
| Advertised power | 220–260 hp |
| Years | 1966–1967 |
| Cylinder head data | 2 of 2 engines |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| Buick 340ci · 3.75" × 3.85" · 9:1 | 340 ci | 3.75" × 3.85" | 9:1 | 220 |
| Buick 340ci · 3.75" × 3.85" · 10.25:1 | 340 ci | 3.75" × 3.85" | 10.25:1 | 260 |
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.