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Jeep World Engine 2.4 specs: 144 ci (2.4L) 4-cylinder, 3.465 x 3.819 in (88 x 97 mm) bore and stroke, 10.5:1 compression. Rated 172 hp, 2007–2017.
The Jeep World Engine 2.4 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).
10.5:1 is in the range that usually runs on pump premium.
It is one of 2 engines in the Jeep 144ci family, all of them 144 ci — the differences between them are in compression, heads and rating, not displacement. 11 factory variants share these dimensions, rated at 172 hp across 2007–2017.
| Displacement | 144 ci / 2.4 L |
|---|---|
| Bore | 3.4646" |
| Stroke | 3.8189" |
| Cylinders | 4 |
| Configuration | I4 |
| Compression ratio | 10.5:1 |
| Bore/stroke ratio | 0.907 |
| Fuel type | gas |
|---|---|
| Redline | 6,500 rpm (factory limit) |
| Advertised HP | 172 hp |
| Years | 2007–2017 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2007 | net | 172 @ 6000 | 165 lb-ft @ 4400 | 10.5:1 |
| 2008 | net | 172 @ 6000 | 165 lb-ft @ 4400 | 10.5:1 |
| 2009 | net | 172 @ 6000 | 165 lb-ft @ 4400 | 10.5:1 |
| 2010 | net | 172 @ 6000 | 165 lb-ft @ 4400 | 10.5:1 |
| 2011 | net | 172 @ 6000 | 165 lb-ft @ 4400 | 10.5:1 |
| 2012 | net | 172 @ 6000 | 165 lb-ft @ 4400 | 10.5:1 |
| 2013 | net | 172 @ 6000 | 165 lb-ft @ 4400 | 10.5:1 |
| 2014 | net | 172 @ 6000 | 165 lb-ft @ 4400 | 10.5:1 |
| 2016 | net | 172 @ 6000 | 165 lb-ft @ 4400 | 10.5:1 |
| 2017 | net | 172 @ 6000 | 165 lb-ft @ 4400 | 10.5:1 |
Factory specification sheet.
| 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 |
| Static compression | 10.5:1 — in the range that usually runs on pump premium |
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 |
|---|---|---|
| 2007 | 172 hp | World Engine 2.4 |
| 2008 | 172 hp | World Engine 2.4 |
| 2009 | 172 hp | World Engine 2.4 |
| 2010 | 172 hp | World Engine 2.4 |
| 2011 | 172 hp | World Engine 2.4 |
| 2012 | 172 hp | World Engine 2.4 |
| 2013 | 172 hp | World Engine 2.4 |
| 2014 | 172 hp | World Engine 2.4 |
| 2015 | 172 hp | World Engine 2.4 |
| 2016 | 172 hp | World Engine 2.4 |
| 2017 | 172 hp | World Engine 2.4 |
2 factory vehicles, 2007–2017. Each year opens that model's engine table.