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Nissan L24E specs: 2.4L (146 ci) 6-cylinder, 83 x 73.7 mm (3.2677 x 2.9016 in) bore and stroke, 8.6:1 compression. Rated 120 hp, 1981–1984.
The Nissan L24E is oversquare — the 3.2677" bore exceeds the 2.9016" stroke by 12.6% — a layout that favors airflow and RPM over leverage at the crank. The 2.9016" stroke does not reach 4,000 ft/min of mean piston speed until about 8,250 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 24.3 ci (399 cc).
8.6:1 is low by modern standards and generally happy on regular pump fuel.
It is one of 10 engines in the L-series family, the smallest at 146 ci. 4 factory variants share these dimensions, rated at 120 hp across 1981–1984.
| Displacement | 146 ci / 2.4 L |
|---|---|
| Bore | 3.2677" |
| Stroke | 2.9016" |
| Cylinders | 6 |
| Configuration | I6 |
| Compression ratio | 8.6:1 * |
| Bore/stroke ratio | 1.126 |
* Compression ratio from a single source; not yet cross-verified.
| Valvetrain | SOHC |
|---|---|
| Fuel type | gas |
| Advertised HP | 120 hp |
| Years | 1981–1984 |
| Bore/stroke character | 1.126 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 2,902 ft/min — conservative for a street engine |
| Displacement per cylinder | 24.3 ci |
| Static compression | 8.6:1 — low by modern standards, generally happy on regular pump fuel |
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 | 120 hp | L24E |
| 1982 | 120 hp | L24E |
| 1983 | 120 hp | L24E |
| 1984 | 120 hp | L24E |
1 factory vehicle, 1981–1984. Each year opens that model's engine table.