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Lincoln 27 Ecoboost V6 specs: 164 ci (2.7L) 6-cylinder, 3.268 x 3.272 in (83 x 83.1 mm) bore and stroke, 10.3:1 compression. Rated 335 hp. DOHC.
The Lincoln 27 Ecoboost V6 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 27.3 ci (448 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 10 engines in the EcoBoost family, sitting between the 122 ci and 213 ci members. Factory fitments include the Lincoln MKX, Lincoln Nautilus, Lincoln Continental and 5 others.
| Displacement | 164 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 | 335 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 | 27.3 ci |
| Static compression | 10.3:1 — in the range that usually runs on pump premium |
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