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Nissan CA20E specs: 2.0L (122 ci) 4-cylinder, 84.5 x 88 mm (3.3268 x 3.4646 in) bore and stroke. Built 1984–1988. Used in the Nissan 200SX.
The Nissan CA20E is close to square: 3.3268" bore against 3.4646" stroke, within 4.0%, which splits the difference between a high-revving layout and a torque layout. The 3.4646" stroke puts mean piston speed at 4,000 ft/min around 6,950 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 Nissan 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 across 1984–1988.
| Displacement | 122 ci / 2 L |
|---|---|
| Bore | 3.3268" |
| Stroke | 3.4646" |
| Cylinders | 4 |
| Configuration | I4 |
| Bore/stroke ratio | 0.96 |
| Fuel type | gas |
|---|---|
| Years | 1984–1988 |
| Bore/stroke character | 0.960 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,465 ft/min — conservative for a street engine |
| 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 |
|---|---|---|
| 1984 | — | CA20E |
| 1985 | — | CA20E |
| 1986 | — | CA20E |
| 1987 | — | CA20E |
| 1988 | — | CA20E |
1 factory vehicle, 1984–1988. Each year opens that model's engine table.