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Ford 6.9L diesel specs: 420 ci (6.9L) 8-cylinder. Rated 170 hp, 1983–1987. Used in the Ford F-250. Rod ratio and piston speed worked out.
Each of the 8 cylinders displaces 52.5 ci (860 cc).
5 factory variants share these dimensions, rated at 170 hp across 1983–1987.
| Displacement | 420 ci / 6.9 L |
|---|---|
| Cylinders | 8 |
| Configuration | V8 |
| Fuel type | diesel |
|---|---|
| Advertised HP | 170 hp |
| Years | 1983–1987 |
| Displacement per cylinder | 52.5 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 |
|---|---|---|
| 1983 | 170 hp | 6.9L diesel |
| 1984 | 170 hp | 6.9L diesel |
| 1985 | 170 hp | 6.9L diesel |
| 1986 | 170 hp | 6.9L diesel |
| 1987 | 170 hp | 6.9L diesel |