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Isuzu C223 specs: 2.2L (134 ci) 4-cylinder, 88 x 92 mm (3.4646 x 3.6220 in) bore and stroke, 21:1 compression. Rated 58 hp, 1981–1987.
The Isuzu C223 is close to square: 3.4646" bore against 3.622" stroke, within 4.3%, which splits the difference between a high-revving layout and a torque layout. 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 33.5 ci (549 cc).
At 21:1 this is a compression-ignition engine: the ratio is the heat source that lights the fuel, not a knock limit to be managed.
It is one of 3 engines in the Isuzu 134ci family, all of them 134 ci — the differences between them are in compression, heads and rating, not displacement. 7 factory variants share these dimensions, rated at 58 hp across 1981–1987.
| Displacement | 134 ci / 2.2 L |
|---|---|
| Bore | 3.4646" |
| Stroke | 3.622" |
| Cylinders | 4 |
| Configuration | I4 |
| Compression ratio | 21:1 * |
| Bore/stroke ratio | 0.957 |
* Compression ratio from a single source; not yet cross-verified.
| Fuel type | diesel |
|---|---|
| Advertised HP | 58 hp |
| Years | 1981–1987 |
| Bore/stroke character | 0.957 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,622 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 33.5 ci |
| Static compression | 21:1 — high enough that pump premium or better is normally required |
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 |
|---|---|---|
| 1981 | 58 hp | C223 |
| 1982 | 58 hp | C223 |
| 1983 | 58 hp | C223 |
| 1984 | — | C223 |
| 1985 | — | C223 |
| 1986 | — | C223 |
| 1987 | — | C223 |
1 factory vehicle, 1981–1987. Each year opens that model's engine table.