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Toyota 2GR-FKS specs: 3.5L (210.9 ci) 6-cylinder, 94 x 83 mm (3.7008 x 3.2677 in) bore and stroke. DOHC. Rod ratio and piston speed worked out.
The Toyota 2GR-FKS 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).
It is one of 11 engines in the GR V6 family, sitting between the 152.5 ci and 241.4 ci members.
| Displacement | 210.9 ci / 3.5 L |
|---|---|
| Bore | 3.7008" |
| Stroke | 3.2677" |
| Cylinders | 6 |
| Bore/stroke ratio | 1.133 |
| Valvetrain | DOHC |
|---|---|
| Fuel type | gas |
| 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 | 35.1 ci |
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