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Ford VT365 specs: 365 ci (6.0L) 8-cylinder, 3.819 x 4.016 in (97 x 102 mm) bore and stroke, 18:1 compression. Rated 235-325 hp. Rod ratio and piston speed.
The Ford VT365 is close to square: 3.8189" bore against 4.0157" stroke, within 4.9%, which splits the difference between a high-revving layout and a torque layout. The 4.0157" stroke puts mean piston speed at 4,000 ft/min around 6,000 RPM, which is where a production bottom end is generally considered at its limit. Each of the 8 cylinders displaces 45.6 ci (748 cc).
At 18:1 this is a compression-ignition engine: the ratio is the heat source that lights the fuel, not a knock limit to be managed.
It is one of 2 engines in the Power Stroke 6.0 family, all of them 365 ci — the differences between them are in compression, heads and rating, not displacement. 3 factory variants share these dimensions, rated from 235 to 325 hp. Factory fitments include the Ford E-350 Super Duty, Ford E-450 Super Duty, International 3200 and 10 others.
| Displacement | 365 ci / 6 L |
|---|---|
| Bore | 3.8189" |
| Stroke | 4.0157" |
| Cylinders | 8 |
| Compression ratio | 18:1 |
| Bore/stroke ratio | 0.951 |
| Block material | cast iron |
|---|---|
| Head material | cast iron |
| Valvetrain | OHV |
| Fuel type | diesel |
| Advertised HP | 235–325 hp |
| Bore/stroke character | 0.951 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 4,016 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 45.6 ci |
| Static compression | 18:1 — high enough that pump premium or better is normally required |
Each link opens the calculator with this engine's specs already filled in.
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|---|---|
| — | — | VT365 |
| — | 235 hp | VT365 |
| — | 325 hp | VT365 |