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Ford Mazda FS DOHC 16v specs: 122 ci (2.0L) 4-cylinder, 3.268 x 3.622 in (83 x 92 mm) bore and stroke. Rated 118 hp, 1993–1997. Used in the Ford Probe.
The Ford Mazda FS DOHC 16v is undersquare — the 3.622" stroke exceeds the 3.2677" bore by 9.8% — a layout that trades peak RPM for leverage and torque low in the range. The 3.622" 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 4 cylinders displaces 30.5 ci (500 cc).
It is one of 6 engines in the Ford 122ci family, all of them 122 ci — the differences between them are in compression, heads and rating, not displacement. 5 factory variants share these dimensions, rated at 118 hp across 1993–1997.
| Displacement | 122 ci / 2 L |
|---|---|
| Bore | 3.2677" |
| Stroke | 3.622" |
| Cylinders | 4 |
| Configuration | I4 |
| Bore/stroke ratio | 0.902 |
| Fuel type | gas |
|---|---|
| Advertised HP | 118 hp |
| Years | 1993–1997 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 1994 | net | 118 @ 5500 | 127 lb-ft @ 4500 | — |
Factory specification sheet.
| Bore/stroke character | 0.902 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,622 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 30.5 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 |
|---|---|---|
| 1993 | — | Mazda FS DOHC 16v |
| 1994 | 118 hp | Mazda FS DOHC 16v |
| 1995 | 118 hp | Mazda FS DOHC 16v |
| 1996 | 118 hp | Mazda FS DOHC 16v |
| 1997 | — | Mazda FS DOHC 16v |
1 factory vehicle, 1993–1997. Each year opens that model's engine table.