See other engines in this family
The same engine also has a main page: Toyota 4GR-FSE.
Lexus 4GR-FSE specs: 2.5L (152.5 ci) 6-cylinder, 83 x 77 mm (3.2677 x 3.0315 in) bore and stroke, 12:1 compression. Rated 204 hp, 2006–2015.
The Lexus 4GR-FSE is oversquare — the 3.2677" bore exceeds the 3.0315" stroke by 7.8% — a layout that favors airflow and RPM over leverage at the crank. The 3.0315" stroke does not reach 4,000 ft/min of mean piston speed until about 7,900 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 25.4 ci (417 cc).
12:1 on aluminum heads 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 2 engines in the Lexus 152ci family, the largest at 152.5 ci. 10 factory variants share these dimensions, rated at 204 hp across 2006–2015.
| Displacement | 152.5 ci / 2.5 L |
|---|---|
| Bore | 3.2677" |
| Stroke | 3.0315" |
| Cylinders | 6 |
| Configuration | V6 |
| Compression ratio | 12:1 |
| Bore/stroke ratio | 1.078 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 204 hp |
| Years | 2006–2015 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2006 | 4GR-FSE net | 204 @ 6400 | 185 lb-ft @ 4800 | 12:1 |
| 2007 | 4GR-FSE net | 204 @ 6400 | 185 lb-ft @ 4800 | 12:1 |
| 2008 | 4GR-FSE net | 204 @ 6400 | 185 lb-ft @ 4800 | 12:1 |
| 2009 | 4GR-FSE net | 204 @ 6400 | 185 lb-ft @ 4800 | 12:1 |
| 2010 | 4GR-FSE net | 204 @ 6400 | 185 lb-ft @ 4800 | 12:1 |
| 2011 | 4GR-FSE net | 204 @ 6400 | 185 lb-ft @ 4800 | 12:1 |
| 2012 | 4GR-FSE net | 204 @ 6400 | 185 lb-ft @ 4800 | 12:1 |
| 2013 | 4GR-FSE net | 204 @ 6400 | 185 lb-ft @ 4800 | 12:1 |
| 2014 | 4GR-FSE net | 204 @ 6400 | 185 lb-ft @ 4800 | 12:1 |
| 2015 | 4GR-FSE net | 204 @ 6400 | 185 lb-ft @ 4800 | 12:1 |
Factory specification sheet.
| Bore/stroke character | 1.078 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,032 ft/min — conservative for a street engine |
| Displacement per cylinder | 25.4 ci |
| Static compression | 12:1 — 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 |
|---|---|---|
| 2006 | 204 hp | 4GR-FSE |
| 2007 | 204 hp | 4GR-FSE |
| 2008 | 204 hp | 4GR-FSE |
| 2009 | 204 hp | 4GR-FSE |
| 2010 | 204 hp | 4GR-FSE |
| 2011 | 204 hp | 4GR-FSE |
| 2012 | 204 hp | 4GR-FSE |
| 2013 | 204 hp | 4GR-FSE |
| 2014 | 204 hp | 4GR-FSE |
| 2015 | 204 hp | 4GR-FSE |
1 factory vehicle, 2006–2015. Each year opens that model's engine table.