See other engines in this family
Cadillac OHV V8 (1970–1976) specs: 500 ci (8.2L) 8-cylinder, 4.30 x 4.304 in (109.2 x 109.3 mm) bore and stroke. Rated 190-400 hp, 1970–1976.
The Cadillac OHV V8 (1970–1976) is close to square: 4.3" bore against 4.304" stroke, within 0.1%, which splits the difference between a high-revving layout and a torque layout. The 4.304" stroke puts mean piston speed at 4,000 ft/min around 5,600 RPM, which is where a production bottom end is generally considered at its limit. Each of the 8 cylinders displaces 62.5 ci (1,024 cc).
It is one of 7 engines in the Cadillac OHV V8 family, the largest at 500 ci. 11 factory variants share these dimensions, rated from 190 to 400 hp across 1970–1976.
| Displacement | 500 ci / 8.2 L |
|---|---|
| Bore | 4.3" |
| Stroke | 4.304" |
| Cylinders | 8 |
| Configuration | V8 |
| Compression ratio | 8.25–8.5:1 (published figures vary) |
| Bore/stroke ratio | 0.999 |
| Block material | cast iron |
|---|---|
| Head material | cast iron |
| Valvetrain | OHV |
| Fuel type | gas |
| Firing order | 1-5-6-3-4-2-7-8 |
| Advertised HP | 190–400 hp |
| Years | 1970–1976 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. | Duration int / exh | Valve lift int / exh | LSA |
|---|---|---|---|---|---|---|---|
| 1971 | gross | 365 @ 4400 | 535 lb-ft @ 2800 | 8.5:1 | — | 0.468" | — |
| 1974 | net | 210 @ 3600 | 380 lb-ft @ 2000 | 8.25:1 | — | — | — |
Factory specification sheet. Durations are the factory's advertised figures at the basis printed on the sheet, not duration at .050" lift; lobe separation is calculated from the printed valve timing.
| Bore/stroke character | 0.999 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 4,304 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 62.5 ci |
Each link opens the calculator with this engine's specs already filled in.
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|---|---|
| 1970 | 400 hp | — |
| 1971 | 365 hp | — |
| 1972 | 235 hp | — |
| 1973 | 235 hp | — |
| 1974 | 210 hp | — |
| 1975 | — | — |
| 1975 | 190 hp | — |
| 1975 | 215 hp | — |
| 1976 | — | — |
| 1976 | 190 hp | — |
| 1976 | 215 hp | — |
2 factory vehicles, 1970–1976. Each year opens that model's engine table.