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Lincoln EcoBoost specs: 140 ci (2.3L) 4-cylinder, 3.445 x 3.701 in (87.5 x 94 mm) bore and stroke, 9.5:1 compression. Rated 285-295 hp. DOHC.
The Lincoln EcoBoost is undersquare — the 3.7008" stroke exceeds the 3.4449" bore by 6.9% — a layout that trades peak RPM for leverage and torque low in the range. The 3.7008" stroke puts mean piston speed at 4,000 ft/min around 6,500 RPM, which is where a production bottom end is generally considered at its limit. Each of the 4 cylinders displaces 35.0 ci (574 cc).
9.5:1 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. 2 factory variants share these dimensions, rated from 285 to 295 hp. Factory fitments include the Lincoln MKC, Lincoln Corsair, Lincoln Nautilus and 6 others.
| Displacement | 140 ci / 2.3 L |
|---|---|
| Bore | 3.4449" |
| Stroke | 3.7008" |
| Cylinders | 4 |
| Compression ratio | 9.5:1 |
| Bore/stroke ratio | 0.931 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 285–295 hp |
| Bore/stroke character | 0.931 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,701 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 35.0 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.
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|---|---|
| — | 285 hp | 2.3L EcoBoost I4, 2.3L EcoBoost, 2.3 I4, 2.3L I4, 2.3L, 2.3 EcoBoost |
| — | 295 hp | 2.3L EcoBoost, 2.3 I4 |