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Ford SCTi specs: 140 ci (2.3L) 4-cylinder, 3.445 x 3.701 in (87.5 x 94 mm) bore and stroke, 9.4:1 compression. Rated 310-350 hp. Rod ratio and piston speed.
The Ford SCTi 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).
9.4:1 on aluminum heads is low by modern standards and generally happy on regular pump fuel.
It is one of 24 engines in the EcoBoost family, sitting between the 61 ci and 213.4 ci members. 2 factory variants share these dimensions, rated from 310 to 350 hp. Factory fitments include the Ford Mustang, Ford Focus RS, Ford Explorer and 2 others.
| Displacement | 140 ci / 2.3 L |
|---|---|
| Bore | 3.4449" |
| Stroke | 3.7008" |
| Cylinders | 4 |
| Compression ratio | 9.4:1 |
| Bore/stroke ratio | 0.931 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 310–350 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 | 9.4:1 — low by modern standards, generally happy on regular pump fuel |
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 |
|---|---|---|
| — | 310 hp | SCTi |
| — | 350 hp | SCTi |