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Ford 3.5 EcoBoost twin-turbo V6 specs: 213.4 ci (3.5L) 6-cylinder, 3.642 x 3.413 in (92.5 x 86.7 mm) bore and stroke, 9:1 compression. Rated 647-660 hp.
The Ford 3.5 EcoBoost twin-turbo V6 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).
9:1 on aluminum heads is low by modern standards and generally happy on regular pump fuel.
It is one of 17 engines in the Cyclone V6 family, the largest at 213.4 ci. 6 factory variants share these dimensions, rated from 647 to 660 hp across 2017–2022.
| Displacement | 213.4 ci / 3.5 L |
|---|---|
| Bore | 3.6417" |
| Stroke | 3.4134" |
| Cylinders | 6 |
| Configuration | V6 |
| Compression ratio | 9:1 |
| 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 | 647–660 hp |
| Years | 2017–2022 |
| 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 | 9:1 — 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 |
|---|---|---|
| 2017 | 647 hp | 3.5 EcoBoost twin-turbo V6 |
| 2018 | 647 hp | 3.5 EcoBoost twin-turbo V6 |
| 2019 | 647 hp | 3.5 EcoBoost twin-turbo V6 |
| 2020 | 660 hp | 3.5 EcoBoost twin-turbo V6 |
| 2021 | 660 hp | 3.5 EcoBoost twin-turbo V6 |
| 2022 | 660 hp | 3.5 EcoBoost twin-turbo V6 |
1 factory vehicle, 2017–2022. Each year opens that model's engine table.