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Mitsubishi 4J1 (2013–2016) specs: 2.4L (144 ci) 4-cylinder, 88 x 97 mm (3.4646 x 3.8189 in) bore and stroke. Rated 184 hp, 2013–2016. Used in the Dodge Dart.
The Mitsubishi 4J1 (2013–2016) is undersquare — the 3.8189" stroke exceeds the 3.4646" bore by 9.3% — a layout that trades peak RPM for leverage and torque low in the range. The 3.8189" stroke puts mean piston speed at 4,000 ft/min around 6,300 RPM, which is where a production bottom end is generally considered at its limit. Each of the 4 cylinders displaces 36.0 ci (590 cc).
It is one of 2 engines in the 4J1 family, all of them 144 ci — the differences between them are in compression, heads and rating, not displacement. 4 factory variants share these dimensions, rated at 184 hp across 2013–2016.
| Displacement | 144 ci / 2.4 L |
|---|---|
| Bore | 3.4646" |
| Stroke | 3.8189" |
| Cylinders | 4 |
| Configuration | I4 |
| Bore/stroke ratio | 0.907 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | SOHC |
| Fuel type | gas |
| Advertised HP | 184 hp |
| Years | 2013–2016 |
| Bore/stroke character | 0.907 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,819 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 36.0 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 |
|---|---|---|
| 2013 | 184 hp | — |
| 2014 | 184 hp | — |
| 2015 | 184 hp | — |
| 2016 | 184 hp | — |