Ford 6.4 Power Stroke specs: 3.87 x 4.13 in (98.3 x 104.9 mm) bore and stroke, shared by all 2 versions. Displacement, compression and factory ratings.
| Displacement | 388.6 ci |
|---|---|
| Cylinders | 8 |
| Bore | 3.870" |
| Stroke | 4.130" |
| Compression | 17.2:1 |
| Advertised power | 350 hp |
| Years | 2008–2010 |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| 6.4L Power Stroke | 388.6 ci | 3.87" × 4.13" | 17.2:1 | — |
| 6.4L Power Stroke | 388.6 ci | 3.87" × 4.13" | 17.2:1 | 350 |
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.