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Lexus 2GR-FXS specs: 3.5L (211 ci) 6-cylinder, 94 x 83 mm (3.7008 x 3.2677 in) bore and stroke, 13:1 compression. Rated 259 hp. Rod ratio and piston speed.
The Lexus 2GR-FXS 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 35.2 ci (576 cc).
13:1 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, sitting between the 201.4 ci and 211.8 ci members. Factory fitments include the RX 450h, GS 450h.
| Displacement | 211 ci / 3.5 L |
|---|---|
| Bore | 3.7008" |
| Stroke | 3.2677" |
| Cylinders | 6 |
| Compression ratio | 13:1 |
| Bore/stroke ratio | 1.133 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 259 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 | 35.2 ci |
| Static compression | 13:1 — high enough that pump premium or better is normally required |
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