See other engines in this family
The same engine also has a main page: Toyota 3UZ-FE.
Lexus 3UZ-FE specs: 4.3L (262 ci) 8-cylinder, 91 x 82.5 mm (3.5827 x 3.2480 in) bore and stroke, 10.5:1 compression. Rated 278-300 hp, 2001–2010.
The Lexus 3UZ-FE is oversquare — the 3.5827" bore exceeds the 3.248" stroke by 10.3% — a layout that favors airflow and RPM over leverage at the crank. The 3.248" stroke does not reach 4,000 ft/min of mean piston speed until about 7,400 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 8 cylinders displaces 32.8 ci (537 cc).
10.5:1 on aluminum heads is in the range that usually runs on pump premium; aluminum sheds heat faster than iron, which makes the same number a little more forgiving.
It is one of 8 engines in the UZ family, sitting between the 242 ci and 285 ci members. 18 factory variants share these dimensions, rated from 278 to 300 hp across 2001–2010.
| Displacement | 262 ci / 4.3 L |
|---|---|
| Bore | 3.5827" |
| Stroke | 3.248" |
| Cylinders | 8 |
| Configuration | V8 |
| Compression ratio | 10.5:1 |
| Bore/stroke ratio | 1.103 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Firing order | 1-8-4-3-6-5-7-2 |
| Advertised HP | 278–300 hp |
| Years | 2001–2010 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2001 | 3UZ-FE net | 300 @ 5600 | 325 lb-ft @ 3400 | 10.5:1 |
| 2002 | 3UZ-FE net | 300 @ 5600 | 325 lb-ft @ 3400 | 10.5:1 |
| 2003 | 3UZ-FE net | 300 @ 5600 | 325 lb-ft @ 3400 | 10.5:1 |
| 2004 | 3UZ-FE net | 300 @ 5600 | 325 lb-ft @ 3400 | 10.5:1 |
| 2005 | 3UZ-FE net | 290 @ 5600 | 320 lb-ft @ 3400 | 10.5:1 |
| 2005 | 3UZ-FE net | 300 @ 5600 | 325 lb-ft @ 3400 | 10.5:1 |
| 2008 | 3UZ-FE net | 288 @ 5600 | 317 lb-ft @ 3400 | 10.5:1 |
| 2009 | 3UZ-FE net | 288 @ 5600 | 317 lb-ft @ 3400 | 10.5:1 |
| 2010 | 3UZ-FE net | 288 @ 5600 | 317 lb-ft @ 3400 | 10.5:1 |
Factory specification sheet.
| Bore/stroke character | 1.103 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,248 ft/min — conservative for a street engine |
| Displacement per cylinder | 32.8 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 |
|---|---|---|
| 2001 | 290 hp | 3UZ-FE |
| 2001 | 300 hp | 3UZ-FE |
| 2002 | 290 hp | 3UZ-FE |
| 2002 | 300 hp | 3UZ-FE |
| 2003 | 290 hp | 3UZ-FE |
| 2003 | 300 hp | 3UZ-FE |
| 2004 | 290 hp | 3UZ-FE |
| 2004 | 300 hp | 3UZ-FE |
| 2005 | 290 hp | 3UZ-FE |
| 2005 | 300 hp | 3UZ-FE |
| 2006 | 278 hp | 3UZ-FE |
| 2006 | 288 hp | 3UZ-FE |
| 2006 | 300 hp | 3UZ-FE |
| 2007 | 288 hp | 3UZ-FE |
| 2007 | 290 hp | 3UZ-FE |
| 2008 | 288 hp | 3UZ-FE |
| 2009 | 288 hp | 3UZ-FE |
| 2010 | 288 hp | 3UZ-FE |
3 factory vehicles, 2001–2010. Each year opens that model's engine table.