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Chrysler Magnum 5.9 specs: 360 ci (5.9L) 8-cylinder, 4.00 x 3.58 in (101.6 x 90.9 mm) bore and stroke. Rated 245 hp, 1999–2003. Used in the Dodge Durango.
The Chrysler Magnum 5.9 is oversquare — the 4" bore exceeds the 3.58" stroke by 11.7% — a layout that favors airflow and RPM over leverage at the crank. The 3.58" stroke puts mean piston speed at 4,000 ft/min around 6,700 RPM, which is where a production bottom end is generally considered at its limit. A rod ratio of 1.71 is in the range most production engines fall in. Each of the 8 cylinders displaces 45.0 ci (737 cc).
It is one of 2 engines in the Chrysler 360ci family, all of them 360 ci — the differences between them are in compression, heads and rating, not displacement. 5 factory variants share these dimensions, rated at 245 hp across 1999–2003.
| Displacement | 360 ci / 5.9 L |
|---|---|
| Bore | 4" |
| Stroke | 3.58" |
| Cylinders | 8 |
| Configuration | V8 |
| Rod length | 6.123" |
| Rod ratio | 1.71 |
| Bore/stroke ratio | 1.117 |
| Block material | cast iron |
|---|---|
| Head material | cast iron |
| Valvetrain | OHV |
| Fuel type | gas |
| Advertised HP | 245 hp |
| Years | 1999–2003 |
| Bore/stroke character | 1.117 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,580 ft/min — in the range typical of performance street engines |
| Rod ratio | 1.71 — moderate — the range most production V8s fall in |
| 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 |
|---|---|---|
| 1999 | 245 hp | Magnum 5.9 |
| 2000 | 245 hp | Magnum 5.9 |
| 2001 | 245 hp | Magnum 5.9 |
| 2002 | 245 hp | Magnum 5.9 |
| 2003 | 245 hp | Magnum 5.9 |