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Lexus GR specs: 3.5L (211.8 ci) 6-cylinder, 94 x 83 mm (3.7008 x 3.2677 in) bore and stroke, 11.8:1 compression. Rated 292-354 hp. Rod ratio and piston speed.
The Lexus GR is oversquare — the 3.7008" bore exceeds the 3.2677" stroke by 13.3% — a layout that favors airflow and RPM over leverage at the crank. The 3.2677" stroke does not reach 4,000 ft/min of mean piston speed until about 7,350 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 35.3 ci (578 cc).
11.8:1 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 7 engines in the GR family, the largest at 211.8 ci. 5 factory variants share these dimensions, rated from 292 to 354 hp. Factory fitments include the Lexus RX 450h, Lexus LC 500h, Lexus LS 500h and 6 others.
| Displacement | 211.8 ci / 3.5 L |
|---|---|
| Bore | 3.7008" |
| Stroke | 3.2677" |
| Cylinders | 6 |
| Compression ratio | 11.8:1 |
| Bore/stroke ratio | 1.133 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 292–354 hp |
| Bore/stroke character | 1.133 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,268 ft/min — conservative for a street engine |
| Displacement per cylinder | 35.3 ci |
| Static compression | 11.8:1 — 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 |
|---|---|---|
| — | 292 hp | 2GR-FXE |
| — | 311 hp | 2GR-FKS |
| — | 311 hp | 8GR-FKS |
| — | 313 hp | 2GR-FXS |
| — | 354 hp | 8GR-FXS |