Bore, stroke, displacement and compression for all 3 Plymouth Chrysler EGA/EGB engines, compared side by side. Plus rod ratio and head specs where published.
| Displacement | 201–230 ci |
|---|---|
| Cylinders | 6 |
| Bore | 3.661–3.780" |
| Stroke | 3.189–3.425" |
| Compression | 8.9–9.0:1 |
| Advertised power | 103–162 hp |
| Years | 1950–1959 |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| EGM | 230 ci | 3.7795" × 3.4252" | 9:1 | 162 |
| Chrysler EGA/EGB (1950–1959) | 230 ci | 3.7795" × 3.4252" | — | 103–138 |
| EGB | 201 ci | 3.6614" × 3.189" | 8.9:1 | 150 |
Both bore and stroke vary across the family, so these are separate castings rather than variations on one block.
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.