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Ford Nano specs: 164.8 ci (2.7L) 6-cylinder, 3.268 x 3.272 in (83 x 83.1 mm) bore and stroke, 10.3:1 compression. Rated 325 hp. Rod ratio and piston speed.
The Ford Nano is close to square: 3.2677" bore against 3.2717" stroke, within 0.1%, which splits the difference between a high-revving layout and a torque layout. The 3.2717" stroke does not reach 4,000 ft/min of mean piston speed until about 7,350 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 27.5 ci (450 cc).
10.3:1 on aluminum heads is in the range that usually runs on pump premium; aluminum sheds heat faster than iron, which makes the same number a little more forgiving.
It is one of 24 engines in the EcoBoost family, sitting between the 61 ci and 213.4 ci members. Factory fitments include the Ford F-150, Ford Edge ST, Lincoln Continental and 1 other.
| Displacement | 164.8 ci / 2.7 L |
|---|---|
| Bore | 3.2677" |
| Stroke | 3.2717" |
| Cylinders | 6 |
| Compression ratio | 10.3:1 |
| Bore/stroke ratio | 0.999 |
| Block material | compacted graphite iron |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 325 hp |
| Bore/stroke character | 0.999 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,272 ft/min — conservative for a street engine |
| Displacement per cylinder | 27.5 ci |
| Static compression | 10.3:1 — in the range that usually runs on pump premium |
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