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Nissan LD28 specs: 2.8L (170 ci) 6-cylinder, 84.5 x 83 mm (3.3268 x 3.2677 in) bore and stroke. Built 1981–1983. Used in the Nissan Maxima.
The Nissan LD28 is close to square: 3.3268" bore against 3.2677" stroke, within 1.8%, which splits the difference between a high-revving layout and a torque layout. The 3.2677" stroke does not reach 4,000 ft/min of mean piston speed until about 7,350 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 28.3 ci (464 cc).
3 factory variants share these dimensions across 1981–1983.
| Displacement | 170 ci / 2.8 L |
|---|---|
| Bore | 3.3268" * |
| Stroke | 3.2677" * |
| Cylinders | 6 |
| Configuration | I6 |
| Bore/stroke ratio | 1.018 |
* Bore and stroke from a single source; not yet cross-verified.
| Fuel type | diesel |
|---|---|
| Years | 1981–1983 |
| Bore/stroke character | 1.018 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,268 ft/min — conservative for a street engine |
| Displacement per cylinder | 28.3 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 | — | LD28 |
| 1982 | — | LD28 |
| 1983 | — | LD28 |
1 factory vehicle, 1981–1983. Each year opens that model's engine table.