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Ford 3.5L EcoBoost High Output specs: 213.4 ci (3.5L) 6-cylinder, 3.642 x 3.413 in (92.5 x 86.7 mm) bore and stroke. Rated 450 hp, 2017–2026.
The Ford 3.5L EcoBoost High Output 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).
It is one of 24 engines in the EcoBoost family, the largest at 213.4 ci. 10 factory variants share these dimensions, rated at 450 hp across 2017–2026.
| Displacement | 213.4 ci / 3.5 L |
|---|---|
| Bore | 3.6417" |
| Stroke | 3.4134" |
| Cylinders | 6 |
| Configuration | V6 |
| Bore/stroke ratio | 1.067 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 450 hp |
| Years | 2017–2026 |
| 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 |
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 |
|---|---|---|
| 2017 | 450 hp | 3.5L EcoBoost High Output |
| 2018 | 450 hp | 3.5L EcoBoost High Output |
| 2019 | 450 hp | 3.5L EcoBoost High Output |
| 2020 | 450 hp | 3.5L EcoBoost High Output |
| 2021 | 450 hp | 3.5L EcoBoost High Output |
| 2022 | 450 hp | 3.5L EcoBoost High Output |
| 2023 | 450 hp | 3.5L EcoBoost High Output |
| 2024 | 450 hp | 3.5L EcoBoost High Output |
| 2025 | 450 hp | 3.5L EcoBoost High Output |
| 2026 | 450 hp | 3.5L EcoBoost High Output |