See other engines in this family
Hyundai G4GC specs: 2.0L (120.5 ci) 4-cylinder, 82 x 93.5 mm (3.2283 x 3.6811 in) bore and stroke, 10.1:1 compression. Rated 138 hp. DOHC.
The Hyundai G4GC is undersquare — the 3.6811" stroke exceeds the 3.2283" bore by 12.3% — a layout that trades peak RPM for leverage and torque low in the range. The 3.6811" stroke puts mean piston speed at 4,000 ft/min around 6,500 RPM, which is where a production bottom end is generally considered at its limit. Each of the 4 cylinders displaces 30.1 ci (494 cc).
10.1:1 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 3 engines in the Beta family, sitting between the 109.8 ci and 121.9 ci members. Factory fitments include the Tiburon, Elantra, Tucson.
| Displacement | 120.5 ci / 2 L |
|---|---|
| Bore | 3.2283" |
| Stroke | 3.6811" |
| Cylinders | 4 |
| Compression ratio | 10.1:1 |
| Bore/stroke ratio | 0.877 |
| Block material | cast iron |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 138 hp |
| Bore/stroke character | 0.877 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,681 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 30.1 ci |
| Static compression | 10.1:1 — in the range that usually runs on pump premium |
Each link opens the calculator with this engine's specs already filled in.