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Ford EcoBoost specs: 213.4 ci (3.5L) 6-cylinder, 3.642 x 3.413 in (92.5 x 86.7 mm) bore and stroke, 10:1 compression. Rated 310 hp, 2015–2026.
The Ford EcoBoost is oversquare — the 3.6417" bore exceeds the 3.4134" stroke by 6.7% — a layout that favors airflow and RPM over leverage at the crank. The 3.4134" stroke does not reach 4,000 ft/min of mean piston speed until about 7,050 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 35.6 ci (583 cc).
10:1 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 17 engines in the Cyclone V6 family, the largest at 213.4 ci. 12 factory variants share these dimensions, rated at 310 hp across 2015–2026.
| Displacement | 213.4 ci / 3.5 L |
|---|---|
| Bore | 3.6417" |
| Stroke | 3.4134" |
| Cylinders | 6 |
| Configuration | V6 |
| Compression ratio | 10:1 |
| Bore/stroke ratio | 1.067 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Firing order | 1-4-2-5-3-6 |
| Advertised HP | 310 hp |
| Years | 2015–2026 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2015 | net | 310 @ 5500 | 400 lb-ft @ 2500 | 10:1 |
| 2016 | net | 310 @ 5500 | 400 lb-ft @ 2500 | 10:1 |
| 2017 | net | 310 @ 5500 | 400 lb-ft @ 2500 | 10:1 |
| 2018 | net | 310 @ 5500 | 400 lb-ft @ 2500 | 10:1 |
| 2019 | net | 310 @ 5500 | 400 lb-ft @ 2500 | 10:1 |
| 2020 | net | 310 @ 5000 | 400 lb-ft @ 2500 | 10:1 |
| 2021 | net | 310 @ 5000 | 400 lb-ft @ 2500 | 10:1 |
| 2025 | net | 310 @ 5000 | 400 lb-ft @ 2500 | 10:1 |
Factory specification sheet.
| Bore/stroke character | 1.067 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,413 ft/min — conservative for a street engine |
| Displacement per cylinder | 35.6 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 |
|---|---|---|
| 2015 | 310 hp | EcoBoost |
| 2016 | 310 hp | EcoBoost |
| 2017 | 310 hp | EcoBoost |
| 2018 | 310 hp | EcoBoost |
| 2019 | 310 hp | EcoBoost |
| 2020 | 310 hp | EcoBoost |
| 2021 | 310 hp | EcoBoost |
| 2022 | 310 hp | EcoBoost |
| 2023 | 310 hp | EcoBoost |
| 2024 | 310 hp | EcoBoost |
| 2025 | 310 hp | EcoBoost |
| 2026 | 310 hp | EcoBoost |
1 factory vehicle, 2015–2026. Each year opens that model's engine table.