Bore, stroke, displacement and compression for all 6 Mitsubishi Cyclone engines, compared side by side. Plus rod ratio and head specs where published.
| Displacement | 181–233 ci |
|---|---|
| Cylinders | 6 |
| Bore | 3.587–3.740" |
| Stroke | 2.992–3.543" |
| Compression | 8.0–10.5:1 |
| Advertised power | 141–320 hp |
| Years | 2000–2012 |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| 6G75 | 233 ci | 3.7402" × 3.5433" | 10.5:1 | 263 |
| 6G75 | 233 ci | 3.7402" × 3.5433" | — | 260–265 |
| 6G72 | 181 ci | 3.5866" × 2.9921" | 10:1 | 222 |
| 6G72 | 181 ci | 3.5866" × 2.9921" | 8.9:1 | 141 |
| 6G72 | 181 ci | 3.5866" × 2.9921" | 8:1 | 320 |
| 6G72 | 181 ci | 3.5866" × 2.9921" | — | 200–210 |
Both bore and stroke vary across the family, so these are separate castings rather than variations on one block.
Compression spans 8:1 to 10.5:1, 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.