Oldsmobile 455ci specs: 4.126 x 4.25 in (104.8 x 108 mm) bore and stroke, shared by all 9 versions. Displacement, compression and factory ratings.
| Displacement | 455 ci |
|---|---|
| Cylinders | 8 |
| Bore | 4.126" |
| Stroke | 4.250" |
| Compression | 9.2:1 |
| Advertised power | 190–390 hp |
| Years | 1968–1976 |
| Cylinder head data | 1 of 9 engines |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| Oldsmobile 455ci · 4.126" × 4.250" · 9.161:1 | 455 ci | 4.126" × 4.25" | 9.161:1 | 190–215 |
| W-45 / W-46 | 455 ci | 4.126" × 4.25" | — | 390 |
| W-46 | 455 ci | 4.126" × 4.25" | — | 380 |
| L33 | 455 ci | 4.126" × 4.25" | — | 320 |
| L31 / W-32 | 455 ci | 4.126" × 4.25" | — | 365 |
| Oldsmobile 455ci (1970–1971) | 455 ci | 4.126" × 4.25" | — | 340–365 |
| W-30 | 455 ci | 4.126" × 4.25" | — | 230–370 |
| L75 | 455 ci | 4.126" × 4.25" | — | 190–270 |
| L77 | 455 ci | 4.126" × 4.25" | — | 270–300 |
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.