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Ram Magnum 5.9 specs: 360 ci (5.9L) 8-cylinder, 4.00 x 3.598 in (101.6 x 91.4 mm) bore and stroke. Rated 230-250 hp, 1994–2003. Used in the Ram 1500. OHV.
The Ram Magnum 5.9 is oversquare — the 4" bore exceeds the 3.5984" stroke by 11.2% — a layout that favors airflow and RPM over leverage at the crank. The 3.5984" stroke puts mean piston speed at 4,000 ft/min around 6,650 RPM, which is where a production bottom end is generally considered at its limit. Each of the 8 cylinders displaces 45.0 ci (737 cc).
It is one of 13 engines in the Magnum family, sitting between the 226 ci and 488 ci members. 19 factory variants share these dimensions, rated from 230 to 250 hp across 1994–2003.
| Displacement | 360 ci / 5.9 L |
|---|---|
| Bore | 4" |
| Stroke | 3.5984" |
| Cylinders | 8 |
| Configuration | V8 |
| Bore/stroke ratio | 1.112 |
| Block material | cast iron |
|---|---|
| Head material | cast iron |
| Valvetrain | OHV |
| Fuel type | gas |
| Advertised HP | 230–250 hp |
| Years | 1994–2003 |
| Bore/stroke character | 1.112 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,598 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 45.0 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 |
|---|---|---|
| 1994 | 230 hp | Magnum 5.9 |
| 1995 | 230 hp | Magnum 5.9 |
| 1996 | 230 hp | Magnum 5.9 |
| 1997 | 235 hp | Magnum 5.9 |
| 1998 | 245 hp | Magnum 5.9 |
| 1998 | 250 hp | Magnum 5.9 |
| 1999 | 245 hp | Magnum 5.9 |
| 1999 | 250 hp | Magnum 5.9 |
| 2000 | 245 hp | Magnum 5.9 |
| 2000 | 250 hp | Magnum 5.9 |
| 2001 | — | Magnum 5.9 |
| 2001 | 245 hp | Magnum 5.9 |
| 2001 | 250 hp | Magnum 5.9 |
| 2002 | — | Magnum 5.9 |
| 2002 | 245 hp | Magnum 5.9 |
| 2002 | 250 hp | Magnum 5.9 |
| 2003 | — | Magnum 5.9 |
| 2003 | 245 hp | Magnum 5.9 |
| 2003 | 250 hp | Magnum 5.9 |