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Lincoln 20 Ecoboost I4 specs: 122 ci (2.0L) 4-cylinder, 3.445 x 3.272 in (87.5 x 83.1 mm) bore and stroke, 9.3:1 compression. Rated 240 hp. DOHC.
The Lincoln 20 Ecoboost I4 is oversquare — the 3.4449" bore exceeds the 3.2717" stroke by 5.3% — a layout that favors airflow and RPM over leverage at the crank. 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 4 cylinders displaces 30.5 ci (500 cc).
9.3:1 on aluminum heads is low by modern standards and generally happy on regular pump fuel.
It is one of 10 engines in the EcoBoost family, the smallest at 122 ci. Factory fitments include the Lincoln MKZ, Lincoln MKC, Lincoln Corsair and 4 others.
| Displacement | 122 ci / 2 L |
|---|---|
| Bore | 3.4449" |
| Stroke | 3.2717" |
| Cylinders | 4 |
| Compression ratio | 9.3:1 |
| Bore/stroke ratio | 1.053 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 240 hp |
| Bore/stroke character | 1.053 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,272 ft/min — conservative for a street engine |
| Displacement per cylinder | 30.5 ci |
| Static compression | 9.3:1 — low by modern standards, generally happy on regular pump fuel |
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