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Cadillac OHV V8 (1968–1974) specs: 472 ci (7.7L) 8-cylinder, 4.299 x 4.059 in (109.2 x 103.1 mm) bore and stroke. Rated 205-375 hp, 1968–1974.
The Cadillac OHV V8 (1968–1974) is oversquare — the 4.2992" bore exceeds the 4.0591" stroke by 5.9% — a layout that favors airflow and RPM over leverage at the crank. The 4.0591" stroke puts mean piston speed at 4,000 ft/min around 5,900 RPM, which is where a production bottom end is generally considered at its limit. Each of the 8 cylinders displaces 59.0 ci (967 cc).
It is one of 7 engines in the Cadillac OHV V8 family, sitting between the 390 ci and 500 ci members. 6 factory variants share these dimensions, rated from 205 to 375 hp across 1968–1974.
| Displacement | 472 ci / 7.7 L |
|---|---|
| Bore | 4.2992" |
| Stroke | 4.0591" |
| Cylinders | 8 |
| Configuration | V8 |
| Compression ratio | 8.25–10.5:1 (published figures vary) |
| Bore/stroke ratio | 1.059 |
| 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 | 205–375 hp |
| Years | 1968–1974 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. | Duration int / exh | Valve lift int / exh | LSA |
|---|---|---|---|---|---|---|---|
| 1968 | gross | 375 | 525 lb-ft | 10.5:1 | — | — | — |
| 1969 | gross | 375 @ 4400 | 525 lb-ft @ 3000 | 10.5:1 | 312° / 308° | 0.440" / 0.454" | 117° |
| 1974 | net | 205 @ 3600 | 365 lb-ft @ 2000 | 8.25:1 | 312° / 308° | 0.457" | 117° |
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 | 1.059 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 4,059 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 59.0 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 |
|---|---|---|
| 1968 | 375 hp | — |
| 1969 | 375 hp | — |
| 1970 | 375 hp | — |
| 1971 | — | — |
| 1972 | 220 hp | — |
| 1974 | 205 hp | — |
2 factory vehicles, 1968–1974. Each year opens that model's engine table.