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Toyota 2AZ-FXE specs: 2.4L (144.2 ci) 4-cylinder, 88.5 x 96 mm (3.4843 x 3.7795 in) bore and stroke, 12.5:1 compression. Rated 187 hp, 2007–2011.
The Toyota 2AZ-FXE is undersquare — the 3.7795" stroke exceeds the 3.4843" bore by 7.8% — a layout that trades peak RPM for leverage and torque low in the range. The 3.7795" stroke puts mean piston speed at 4,000 ft/min around 6,350 RPM, which is where a production bottom end is generally considered at its limit. Each of the 4 cylinders displaces 36.1 ci (591 cc).
12.5:1 is high for a production gasoline engine; running a ratio like that on pump fuel depends on chamber design and fuel delivery rather than the number alone.
It is one of 3 engines in the AZ family, all of them 144.2 ci — the differences between them are in compression, heads and rating, not displacement. 5 factory variants share these dimensions, rated at 187 hp across 2007–2011.
| Displacement | 144.2 ci / 2.4 L |
|---|---|
| Bore | 3.4843" |
| Stroke | 3.7795" |
| Cylinders | 4 |
| Configuration | I4 |
| Compression ratio | 12.5:1 * |
| Bore/stroke ratio | 0.922 |
* Compression ratio from a single source; not yet cross-verified.
| Fuel type | gas |
|---|---|
| Advertised HP | 187 hp |
| Years | 2007–2011 |
| Bore/stroke character | 0.922 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,780 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 36.0 ci |
| Static compression | 12.5:1 — high enough that pump premium or better is normally required |
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 | 187 hp | 2AZ-FXE |
| 2008 | 187 hp | 2AZ-FXE |
| 2009 | 187 hp | 2AZ-FXE |
| 2010 | 187 hp | 2AZ-FXE |
| 2011 | 187 hp | 2AZ-FXE |
1 factory vehicle, 2007–2011. Each year opens that model's engine table.