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Toyota 22R specs: 2.4L (144.4 ci) 4-cylinder, 92 x 89 mm (3.6220 x 3.5039 in) bore and stroke. Built 1981–1990. Used in the Toyota Pickup and Toyota 4Runner.
The Toyota 22R (22R) is close to square: 3.622" bore against 3.5039" stroke, within 3.4%, which splits the difference between a high-revving layout and a torque layout. The 3.5039" stroke puts mean piston speed at 4,000 ft/min around 6,850 RPM, which is where a production bottom end is generally considered at its limit. Each of the 4 cylinders displaces 36.1 ci (592 cc).
It is one of 6 engines in the 22R family, all of them 144.4 ci — the differences between them are in compression, heads and rating, not displacement. 10 factory variants share these dimensions across 1981–1990.
| Displacement | 144.4 ci / 2.4 L |
|---|---|
| Bore | 3.622" |
| Stroke | 3.5039" |
| Cylinders | 4 |
| Configuration | I4 |
| Bore/stroke ratio | 1.034 |
| Block material | cast iron |
|---|---|
| Head material | aluminum |
| Valvetrain | SOHC |
| Fuel type | gas |
| Years | 1981–1990 |
| Bore/stroke character | 1.034 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,504 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 36.1 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 |
|---|---|---|
| 1981 | — | 22R |
| 1982 | — | 22R |
| 1983 | — | 22R |
| 1984 | — | 22R |
| 1985 | — | 22R |
| 1986 | — | 22R |
| 1987 | — | 22R |
| 1988 | — | 22R |
| 1989 | — | 22R |
| 1990 | — | 22R |