See other engines in this family
Ford 2019 315 585HP specs: 315 ci (5.2L) 8-cylinder, 3.70 x 3.661 in (94 x 93 mm) bore and stroke, 9.5:1 compression. Rated 585 hp, 2019. OHV.
The Ford 2019 315 585HP is close to square: 3.7" bore against 3.661" stroke, within 1.1%, which splits the difference between a high-revving layout and a torque layout. The 3.661" stroke puts mean piston speed at 4,000 ft/min around 6,550 RPM, which is where a production bottom end is generally considered at its limit. A rod ratio of 1.621 is in the range most production engines fall in. Each of the 8 cylinders displaces 39.4 ci (645 cc).
9.5:1 on iron heads is in the range that usually runs on pump premium; iron holds heat, so treat it as the less forgiving side of that range.
It is one of 3 engines in the Ford 315ci family, all of them 315 ci — the differences between them are in compression, heads and rating, not displacement.
| Displacement | 315 ci / 5.2 L |
|---|---|
| Bore | 3.7" |
| Stroke | 3.661" |
| Cylinders | 8 |
| Configuration | V8 |
| Compression ratio | 9.5:1 |
| Rod length | 5.933" |
| Rod ratio | 1.621 |
| Bore/stroke ratio | 1.011 |
| Piston deck clearance | 0" |
| Block material | cast iron |
|---|---|
| Head material | cast iron |
| Valvetrain | OHV |
| Fuel type | gas |
| Advertised HP | 585 hp |
| Years | 2019 |
| Bore/stroke character | 1.011 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,661 ft/min — in the range typical of performance street engines |
| Rod ratio | 1.621 — moderate — the range most production V8s fall in |
| Displacement per cylinder | 39.4 ci |
| Static compression | 9.5:1 — in the range that usually runs on pump premium |
Each link opens the calculator with this engine's specs already filled in.