Kia 152ci specs: 88.5 x 101.5 mm (3.4843 x 3.9961 in) bore and stroke, shared by all 2 versions. Displacement, compression and factory ratings.
| Displacement | 152.4 ci |
|---|---|
| Cylinders | 4 |
| Bore | 3.484" |
| Stroke | 3.996" |
| Compression | 10.5–13.0:1 |
| Advertised power | 191–290 hp |
| Years | 2021–2026 |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| G4KP | 152.4 ci | 3.4843" × 3.9961" | 10.5:1 | 290 |
| G4KN | 152.4 ci | 3.4843" × 3.9961" | 13:1 | 191 |
Compression spans 10.5:1 to 13:1, so fuel requirements differ meaningfully between members — worth checking before assuming parts interchange.
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.