Bore, stroke, displacement and compression for all 2 Hyundai Lambda II engines, compared side by side. Plus rod ratio and head specs where published.
| Displacement | 203.9–230.5 ci |
|---|---|
| Cylinders | 6 |
| Bore | 3.622–3.780" |
| Stroke | 3.299–3.425" |
| Compression | 10.0–11.5:1 |
| Advertised power | 291–365 hp |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| G6DA | 230.5 ci | 3.7795" × 3.4252" | 11.5:1 | 291 |
| G6DP | 203.9 ci | 3.622" × 3.2992" | 10:1 | 365 |
Both bore and stroke vary across the family, so these are separate castings rather than variations on one block.
Compression spans 10:1 to 11.5:1, so fuel requirements differ meaningfully between members — worth checking before assuming parts interchange.
All are oversquare — bore larger than stroke, which favours revs over low-end torque.
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.