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Dodge 360ci (1971–1992) specs: 360 ci (5.9L) 8-cylinder, 4.00 x 3.579 in (101.6 x 90.9 mm) bore and stroke, 8.7:1 compression. Rated 170-255 hp, 1971–1992.
The Dodge 360ci (1971–1992) is oversquare — the 4" bore exceeds the 3.5787" stroke by 11.8% — a layout that favors airflow and RPM over leverage at the crank. The 3.5787" 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 1.711 is in the range most production engines fall in. Each of the 8 cylinders displaces 45.0 ci (737 cc).
8.7:1 on iron heads is low by modern standards and generally happy on regular pump fuel.
It is one of 17 engines in the Dodge 360ci family, all of them 360 ci — the differences between them are in compression, heads and rating, not displacement. 25 factory variants share these dimensions, rated from 170 to 255 hp across 1971–1992.
| Displacement | 360 ci / 5.9 L |
|---|---|
| Bore | 4" |
| Stroke | 3.5787" |
| Cylinders | 8 |
| Configuration | V8 |
| Compression ratio | 8.7:1 |
| Rod length | 6.123" |
| Rod ratio | 1.711 |
| Bore/stroke ratio | 1.118 |
| Block material | cast iron |
|---|---|
| Head material | cast iron |
| Valvetrain | OHV |
| Fuel type | gas |
| Firing order | 1-8-4-3-6-5-7-2 |
| Advertised HP | 170–255 hp |
| Years | 1971–1992 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 1971 | gross | 255 @ 4400 | 360 lb-ft @ 2400 | 8.7:1 |
Factory specification sheet.
| Bore/stroke character | 1.118 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,579 ft/min — in the range typical of performance street engines |
| Rod ratio | 1.711 — moderate — the range most production V8s fall in |
| Displacement per cylinder | 45.0 ci |
| Static compression | 8.7:1 — low by modern standards, generally happy on regular pump fuel |
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 |
|---|---|---|
| 1971 | 255 hp | — |
| 1972 | — | — |
| 1973 | — | — |
| 1974 | — | — |
| 1974 | 180 hp | — |
| 1974 | 245 hp | — |
| 1975 | — | — |
| 1975 | 180 hp | — |
| 1975 | 230 hp | — |
| 1976 | — | — |
| 1976 | 170 hp | — |
| 1976 | 220 hp | — |
| 1977 | — | — |
| 1978 | — | — |
| 1979 | — | — |
| 1981 | — | — |
| 1984 | — | — |
| 1985 | — | — |
| 1986 | — | — |
| 1987 | — | — |
| 1988 | — | — |
| 1989 | — | — |
| 1990 | — | — |
| 1991 | — | — |
| 1992 | — | — |
5 factory vehicles, 1971–1992. Each year opens that model's engine table.