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Ford 1.5 EcoBoost specs: 91 ci (1.5L) 4-cylinder, 3.11 x 3.008 in (79 x 76.4 mm) bore and stroke, 10:1 compression. Rated 181 hp, 2014–2020.
The Ford 1.5 EcoBoost is close to square: 3.1102" bore against 3.0079" stroke, within 3.4%, which splits the difference between a high-revving layout and a torque layout. The 3.0079" stroke does not reach 4,000 ft/min of mean piston speed until about 8,000 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 4 cylinders displaces 22.8 ci (373 cc).
10:1 is in the range that usually runs on pump premium.
7 factory variants share these dimensions, rated at 181 hp across 2014–2020.
| Displacement | 91 ci / 1.5 L |
|---|---|
| Bore | 3.1102" |
| Stroke | 3.0079" |
| Cylinders | 4 |
| Configuration | I4 |
| Compression ratio | 10:1 * |
| Bore/stroke ratio | 1.034 |
* Compression ratio from a single source; not yet cross-verified.
| Fuel type | gas |
|---|---|
| Advertised HP | 181 hp |
| Years | 2014–2020 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2015 | net | 181 @ 6000 | 185 lb-ft @ 4320 | — |
| 2016 | net | 181 @ 6000 | 185 lb-ft @ 4320 | — |
| 2017 | net | 181 @ 6000 | 185 lb-ft @ 4320 | — |
| 2018 | net | 181 @ 6000 | 185 lb-ft @ 4320 | — |
| 2019 | net | 181 @ 6000 | 185 lb-ft @ 4320 | — |
Factory specification sheet.
| Bore/stroke character | 1.034 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,008 ft/min — conservative for a street engine |
| Displacement per cylinder | 22.8 ci |
| Static compression | 10:1 — 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 |
|---|---|---|
| 2014 | 181 hp | 1.5 EcoBoost |
| 2015 | 181 hp | 1.5 EcoBoost |
| 2016 | 181 hp | 1.5 EcoBoost |
| 2017 | 181 hp | 1.5 EcoBoost |
| 2018 | 181 hp | 1.5 EcoBoost |
| 2019 | 181 hp | 1.5 EcoBoost |
| 2020 | 181 hp | 1.5 EcoBoost |
1 factory vehicle, 2014–2020. Each year opens that model's engine table.