Hyundai Gamma specs: 77 x 85.4 mm (3.0315 x 3.3622 in) bore and stroke, shared by all 2 versions. Displacement, compression and factory ratings.
| Displacement | 97.1–97.6 ci |
|---|---|
| Cylinders | 4 |
| Bore | 3.031" |
| Stroke | 3.362" |
| Compression | 9.5:1 |
| Advertised power | 201 hp |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| G4FJ | 97.6 ci | 3.0315" × 3.3622" | 9.5:1 | 201 |
| G4FJ | 97.1 ci | 3.0315" × 3.3622" | 9.5:1 | 201 |
All are undersquare — stroke larger than bore, favouring torque low in the range.
Each engine page carries rod ratio, mean piston speed, bore/stroke character and cylinder head specs where published, and links into the calculators with its dimensions already filled in.