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Cadillac 472 specs: 472 ci (7.7L) 8-cylinder, 4.299 x 4.059 in (109.2 x 103.1 mm) bore and stroke, 10:1 compression. Rated 375 hp. Rod ratio and piston speed.
The Cadillac OHV V8 (472) 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).
10:1 on iron heads is in the range that usually runs on pump premium; iron holds heat, so treat it as the less forgiving side of that range.
It is one of 4 engines in the Cadillac OHV V8 family, sitting between the 390 ci and 500 ci members. Factory fitments include the Cadillac DeVille, Cadillac Fleetwood, Cadillac Eldorado and 4 others.
| Displacement | 472 ci / 7.7 L |
|---|---|
| Bore | 4.2992" |
| Stroke | 4.0591" |
| Cylinders | 8 |
| Compression ratio | 10:1 |
| Bore/stroke ratio | 1.059 |
| Block material | cast iron |
|---|---|
| Head material | cast iron |
| Valvetrain | OHV |
| Fuel type | gas |
| Advertised HP | 375 hp |
| 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 |
| Static compression | 10:1 — in the range that usually runs on pump premium |
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