See other engines in this family
Subaru FA20DIT specs: 2.0L (122 ci) 4-cylinder, 92 x 75 mm (3.6220 x 2.9528 in) bore and stroke, 10.6:1 compression. Rated 250 hp, 2014–2018.
The Subaru FA20DIT is oversquare — the 3.622" bore exceeds the 2.9528" stroke by 22.7% — a layout that favors airflow and RPM over leverage at the crank. The 2.9528" stroke does not reach 4,000 ft/min of mean piston speed until about 8,150 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. A rod ratio of 1.74 is in the range most production engines fall in. Each of the 4 cylinders displaces 30.5 ci (500 cc).
10.6:1 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 43 engines in the EJ family, sitting between the 91.1 ci and 152 ci members. 5 factory variants share these dimensions, rated at 250 hp across 2014–2018.
| Displacement | 122 ci / 2 L |
|---|---|
| Bore | 3.622" |
| Stroke | 2.9528" |
| Cylinders | 4 |
| Compression ratio | 10.6:1 |
| Rod length | 5.138" |
| Rod ratio | 1.74 |
| Bore/stroke ratio | 1.227 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 250 hp |
| Years | 2014–2018 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2014 | FA20DIT net | 250 @ 5600 | 258 lb-ft @ 2000 | 10.6:1 |
| 2015 | FA20DIT net | 250 @ 5600 | 258 lb-ft @ 2000 | 10.6:1 |
| 2016 | FA20DIT net | 250 @ 5600 | 258 lb-ft @ 2000 | 10.6:1 |
| 2017 | FA20DIT net | 250 @ 5600 | 258 lb-ft @ 2000 | 10.6:1 |
| 2018 | FA20DIT net | 250 @ 5600 | 258 lb-ft @ 2000 | 10.6:1 |
Factory specification sheet.
| Bore/stroke character | 1.227 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 2,953 ft/min — conservative for a street engine |
| Rod ratio | 1.74 — moderate — the range most production V8s fall in |
| Displacement per cylinder | 30.5 ci |
| Static compression | 10.6:1 — 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 | 250 hp | FA20DIT |
| 2015 | 250 hp | FA20DIT |
| 2016 | 250 hp | FA20DIT |
| 2017 | 250 hp | FA20DIT |
| 2018 | 250 hp | FA20DIT |
1 factory vehicle, 2014–2018. Each year opens that model's engine table.