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Jeep AMC 304 2-bbl specs: 304 ci (5.0L) 8-cylinder, 3.75 x 3.44 in (95.3 x 87.4 mm) bore and stroke. Rated 125-150 hp, 1972–1981. Used in the Jeep CJ. OHV.
The Jeep AMC 304 2-bbl is oversquare — the 3.75" bore exceeds the 3.44" stroke by 9.0% — a layout that favors airflow and RPM over leverage at the crank. The 3.44" stroke puts mean piston speed at 4,000 ft/min around 7,000 RPM, which is where a production bottom end is generally considered at its limit. Each of the 8 cylinders displaces 38.0 ci (623 cc).
It is one of 15 engines in the AMC V8 family, the smallest at 304 ci. 10 factory variants share these dimensions, rated from 125 to 150 hp across 1972–1981.
| Displacement | 304 ci / 5 L |
|---|---|
| Bore | 3.75" |
| Stroke | 3.44" |
| Cylinders | 8 |
| Configuration | V8 |
| Bore/stroke ratio | 1.09 |
| Block material | cast iron |
|---|---|
| Head material | cast iron |
| Valvetrain | OHV |
| Fuel type | gas |
| Advertised HP | 125–150 hp |
| Years | 1972–1981 |
| Bore/stroke character | 1.090 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,440 ft/min — conservative for a street engine |
| Displacement per cylinder | 38.0 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 |
|---|---|---|
| 1972 | 150 hp | AMC 304 2-bbl |
| 1973 | 150 hp | AMC 304 2-bbl |
| 1974 | 150 hp | AMC 304 2-bbl |
| 1975 | 150 hp | AMC 304 2-bbl |
| 1976 | 150 hp | AMC 304 2-bbl |
| 1977 | 150 hp | AMC 304 2-bbl |
| 1978 | 150 hp | AMC 304 2-bbl |
| 1979 | 130 hp | AMC 304 2-bbl |
| 1980 | 125 hp | AMC 304 2-bbl |
| 1981 | 125 hp | AMC 304 2-bbl |