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Ford 2019 327 610HP specs: 327 ci (5.4L) 8-cylinder, 3.70 x 3.80 in (94 x 96.5 mm) bore and stroke, 12.5:1 compression. Rated 610 hp, 2019. OHV.
The Ford 2019 327 610HP is close to square: 3.7" bore against 3.8" stroke, within 2.6%, which splits the difference between a high-revving layout and a torque layout. The 3.8" stroke puts mean piston speed at 4,000 ft/min around 6,300 RPM, which is where a production bottom end is generally considered at its limit. A rod ratio of 1.539 is short — higher piston acceleration and more side-load, typical of stroker combinations and a reason to watch piston speed closely. Each of the 8 cylinders displaces 40.9 ci (670 cc).
12.5:1 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.
| Displacement | 327 ci / 5.4 L |
|---|---|
| Bore | 3.7" |
| Stroke | 3.8" |
| Cylinders | 8 |
| Configuration | V8 |
| Compression ratio | 12.5:1 |
| Rod length | 5.85" |
| Rod ratio | 1.539 |
| Bore/stroke ratio | 0.974 |
| Piston deck clearance | 0" |
| Block material | cast iron |
|---|---|
| Head material | cast iron |
| Valvetrain | OHV |
| Fuel type | gas |
| Advertised HP | 610 hp |
| Years | 2019 |
| Bore/stroke character | 0.974 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,800 ft/min — in the range typical of performance street engines |
| Rod ratio | 1.539 — short — more side loading and piston dwell at TDC, typical of stroker combinations |
| Displacement per cylinder | 40.9 ci |
| Static compression | 12.5:1 — high enough that pump premium or better is normally required |
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