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Nissan A15 specs: 1.5L (92 ci) 4-cylinder, 76 x 82 mm (2.9921 x 3.2283 in) bore and stroke. Built 1979–1982. Used in the Datsun 210.
The Nissan 92ci (A15) is undersquare — the 3.2283" stroke exceeds the 2.9921" bore by 7.3% — a layout that trades peak RPM for leverage and torque low in the range. The 3.2283" stroke does not reach 4,000 ft/min of mean piston speed until about 7,450 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 4 cylinders displaces 23.0 ci (377 cc).
It is one of 3 engines in the Nissan 92ci family, all of them 92 ci — the differences between them are in compression, heads and rating, not displacement. 4 factory variants share these dimensions across 1979–1982.
| Displacement | 92 ci / 1.5 L |
|---|---|
| Bore | 2.9921" |
| Stroke | 3.2283" |
| Cylinders | 4 |
| Configuration | I4 |
| Bore/stroke ratio | 0.927 |
| Fuel type | gas |
|---|---|
| Years | 1979–1982 |
| Bore/stroke character | 0.927 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,228 ft/min — conservative for a street engine |
| Displacement per cylinder | 23.0 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 |
|---|---|---|
| 1979 | — | A15 |
| 1980 | — | A15 |
| 1981 | — | A15 |
| 1982 | — | A15 |
1 factory vehicle, 1979–1982. Each year opens that model's engine table.