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Mitsubishi 4G69 specs: 2.4L (146 ci) 4-cylinder, 87 x 100 mm (3.4252 x 3.9370 in) bore and stroke. Rated 160-162 hp, 2004–2012. Used in the Mitsubishi Galant.
The Mitsubishi 4G69 is undersquare — the 3.937" stroke exceeds the 3.4252" bore by 13.0% — a layout that trades peak RPM for leverage and torque low in the range. The 3.937" stroke puts mean piston speed at 4,000 ft/min around 6,100 RPM, which is where a production bottom end is generally considered at its limit. Each of the 4 cylinders displaces 36.5 ci (598 cc).
It is one of 5 engines in the Mitsubishi 146ci family, all of them 146 ci — the differences between them are in compression, heads and rating, not displacement. 12 factory variants share these dimensions, rated from 160 to 162 hp across 2004–2012.
| Displacement | 146 ci / 2.4 L |
|---|---|
| Bore | 3.4252" |
| Stroke | 3.937" |
| Cylinders | 4 |
| Configuration | I4 |
| Bore/stroke ratio | 0.87 |
| Fuel type | gas |
|---|---|
| Firing order | 1-3-4-2 |
| Advertised HP | 160–162 hp |
| Years | 2004–2012 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2010 | 4G69 net | 160 @ 5500 | 157 lb-ft @ 4000 | — |
| 2011 | 4G69 net | 160 @ 5500 | 157 lb-ft @ 4000 | — |
| 2012 | 4G69 net | 160 @ 5500 | 157 lb-ft @ 4000 | — |
Factory specification sheet.
| Bore/stroke character | 0.870 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,937 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 36.5 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 |
|---|---|---|
| 2004 | 160 hp | 4G69 |
| 2004 | 162 hp | 4G69 |
| 2005 | 160 hp | 4G69 |
| 2005 | 162 hp | 4G69 |
| 2006 | 160 hp | 4G69 |
| 2006 | 162 hp | 4G69 |
| 2007 | 160 hp | 4G69 |
| 2008 | 160 hp | 4G69 |
| 2009 | 160 hp | 4G69 |
| 2010 | 160 hp | 4G69 |
| 2011 | 160 hp | 4G69 |
| 2012 | 160 hp | 4G69 |
3 factory vehicles, 2004–2012. Each year opens that model's engine table.