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Mazda FE specs: 1.999L (122 ci) 4-cylinder, 86 x 86 mm (3.3858 x 3.3858 in) bore and stroke, 8.6:1 compression. Rated 83 hp, 1983–1987. Used in the Mazda 626.
The Mazda MZR (FE) is exactly square — 3.3858" bore and 3.3858" stroke are the same — which splits the difference between a high-revving layout and a torque layout. The 3.3858" stroke does not reach 4,000 ft/min of mean piston speed until about 7,100 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 4 cylinders displaces 30.5 ci (500 cc).
8.6:1 on aluminum heads is low by modern standards and generally happy on regular pump fuel.
It is one of 14 engines in the MZR family, the smallest at 122 ci. 5 factory variants share these dimensions, rated at 83 hp across 1983–1987.
| Displacement | 122 ci / 1.999 L |
|---|---|
| Bore | 3.3858" |
| Stroke | 3.3858" |
| Cylinders | 4 |
| Configuration | I4 |
| Compression ratio | 8.6:1 |
| Bore/stroke ratio | 1 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 83 hp |
| Years | 1983–1987 |
| Bore/stroke character | 1.000 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,386 ft/min — conservative for a street engine |
| Displacement per cylinder | 30.5 ci |
| Static compression | 8.6:1 — 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 |
|---|---|---|
| 1983 | 83 hp | FE |
| 1984 | — | FE |
| 1985 | — | FE |
| 1986 | — | FE |
| 1987 | — | FE |
2 factory vehicles, 1983–1987. Each year opens that model's engine table.