See other engines in this family
The same engine also has a main page: Toyota 2UZ-FE.
Lexus UZ specs: 4.7L (285 ci) 8-cylinder, 94 x 84 mm (3.7008 x 3.3071 in) bore and stroke, 9.6:1 compression. Rated 230-275 hp. Rod ratio and piston speed.
The Lexus UZ is oversquare — the 3.7008" bore exceeds the 3.3071" stroke by 11.9% — a layout that favors airflow and RPM over leverage at the crank. The 3.3071" stroke does not reach 4,000 ft/min of mean piston speed until about 7,250 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 8 cylinders displaces 35.6 ci (584 cc).
9.6:1 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 5 engines in the UZ family, the largest at 285 ci. 3 factory variants share these dimensions, rated from 230 to 275 hp. Factory fitments include the Lexus LX 470, Lexus GX 470, Lexus GS 470 and 3 others.
| Displacement | 285 ci / 4.7 L |
|---|---|
| Bore | 3.7008" |
| Stroke | 3.3071" |
| Cylinders | 8 |
| Compression ratio | 9.6:1 |
| Bore/stroke ratio | 1.119 |
| Block material | cast iron |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 230–275 hp |
| Bore/stroke character | 1.119 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,307 ft/min — conservative for a street engine |
| Displacement per cylinder | 35.6 ci |
| Static compression | 9.6:1 — 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 |
|---|---|---|
| — | 230 hp | 2UZ-FE |
| — | 235 hp | 2UZ-FE |
| — | 275 hp | 2UZ-FE (VVT-i) |