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Ford 2019 351 570HP specs: 351 ci (5.8L) 8-cylinder, 3.632 x 4.245 in (92.3 x 107.8 mm) bore and stroke, 11.5:1 compression. Rated 570 hp, 2019. OHV.
The Ford 2019 351 570HP is undersquare — the 4.245" stroke exceeds the 3.632" bore by 14.4% — a layout that trades peak RPM for leverage and torque low in the range. The 4.245" stroke puts mean piston speed at 4,000 ft/min around 5,650 RPM, which is where a production bottom end is generally considered at its limit. A rod ratio of 1.568 is in the range most production engines fall in. Each of the 8 cylinders displaces 43.9 ci (719 cc).
11.5:1 on iron heads is high for a production gasoline engine; running a ratio like that on pump fuel depends on chamber design and fuel delivery rather than the number alone.
It is one of 37 engines in the Ford 351ci family, all of them 351 ci — the differences between them are in compression, heads and rating, not displacement.
| Displacement | 351 ci / 5.8 L |
|---|---|
| Bore | 3.632" |
| Stroke | 4.245" |
| Cylinders | 8 |
| Configuration | V8 |
| Compression ratio | 11.5:1 |
| Rod length | 6.658" |
| Rod ratio | 1.568 |
| Bore/stroke ratio | 0.856 |
| Piston deck clearance | 0.006" |
| Block material | cast iron |
|---|---|
| Head material | cast iron |
| Valvetrain | OHV |
| Fuel type | gas |
| Advertised HP | 570 hp |
| Years | 2019 |
| Bore/stroke character | 0.856 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 4,245 ft/min — in the range typical of performance street engines |
| Rod ratio | 1.568 — moderate — the range most production V8s fall in |
| Displacement per cylinder | 43.9 ci |
| Static compression | 11.5:1 — high enough that pump premium or better is normally required |
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