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Toyota 3UR-FE specs: 5.7L (346 ci) 8-cylinder, 94 x 102 mm (3.7008 x 4.0157 in) bore and stroke. Rated 381 hp, 2007–2021. Used in the Toyota Tundra. DOHC.
The Toyota 3UR-FE is undersquare — the 4.0157" stroke exceeds the 3.7008" bore by 7.8% — a layout that trades peak RPM for leverage and torque low in the range. The 4.0157" stroke puts mean piston speed at 4,000 ft/min around 6,000 RPM, which is where a production bottom end is generally considered at its limit. Each of the 8 cylinders displaces 43.3 ci (709 cc).
15 factory variants share these dimensions, rated at 381 hp across 2007–2021.
| Displacement | 346 ci / 5.7 L |
|---|---|
| Bore | 3.7008" |
| Stroke | 4.0157" |
| Cylinders | 8 |
| Configuration | V8 |
| Bore/stroke ratio | 0.922 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 381 hp |
| Years | 2007–2021 |
| Bore/stroke character | 0.922 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 4,016 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 43.3 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 |
|---|---|---|
| 2007 | 381 hp | 3UR-FE |
| 2008 | 381 hp | 3UR-FE |
| 2009 | 381 hp | 3UR-FE |
| 2010 | 381 hp | 3UR-FE |
| 2011 | 381 hp | 3UR-FE |
| 2012 | 381 hp | 3UR-FE |
| 2013 | 381 hp | 3UR-FE |
| 2014 | 381 hp | 3UR-FE |
| 2015 | 381 hp | 3UR-FE |
| 2016 | 381 hp | 3UR-FE |
| 2017 | 381 hp | 3UR-FE |
| 2018 | 381 hp | 3UR-FE |
| 2019 | 381 hp | 3UR-FE |
| 2020 | 381 hp | 3UR-FE |
| 2021 | 381 hp | 3UR-FE |