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Ford 302ci specs: 302 ci (4.9L) 8-cylinder, 3.631 x 3.649 in (92.2 x 92.7 mm) bore and stroke, 11.6:1 compression. Rated 370 hp, 2015–2017. OHV.
The Ford 302ci is close to square: 3.631" bore against 3.649" stroke, within 0.5%, which splits the difference between a high-revving layout and a torque layout. The 3.649" stroke puts mean piston speed at 4,000 ft/min around 6,600 RPM, which is where a production bottom end is generally considered at its limit. A rod ratio of 1.626 is in the range most production engines fall in. Each of the 8 cylinders displaces 37.8 ci (619 cc).
11.6:1 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 302ci family, all of them 302 ci — the differences between them are in compression, heads and rating, not displacement. 3 factory variants share these dimensions, rated at 370 hp across 2015–2017.
| Displacement | 302 ci / 4.9 L |
|---|---|
| Bore | 3.631" |
| Stroke | 3.649" |
| Cylinders | 8 |
| Configuration | V8 |
| Compression ratio | 11.6:1 |
| Rod length | 5.933" |
| Rod ratio | 1.626 |
| Bore/stroke ratio | 0.995 |
| Block material | cast iron |
|---|---|
| Head material | cast iron |
| Valvetrain | OHV |
| Fuel type | gas |
| Advertised HP | 370 hp |
| Years | 2015–2017 |
| Bore/stroke character | 0.995 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,649 ft/min — in the range typical of performance street engines |
| Rod ratio | 1.626 — moderate — the range most production V8s fall in |
| Displacement per cylinder | 37.8 ci |
| Static compression | 11.6:1 — high enough that pump premium or better is normally required |
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These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|---|---|
| 2015 | 370 hp | — |
| 2016 | 370 hp | — |
| 2017 | 370 hp | — |