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Toyota 1AR-FE specs: 2.7L (163 ci) 4-cylinder, 90 x 105 mm (3.5433 x 4.1339 in) bore and stroke, 10:1 compression. Rated 185-187 hp, 2009–2019.
The Toyota 1AR-FE is undersquare — the 4.1339" stroke exceeds the 3.5433" bore by 14.3% — a layout that trades peak RPM for leverage and torque low in the range. The 4.1339" stroke puts mean piston speed at 4,000 ft/min around 5,800 RPM, which is where a production bottom end is generally considered at its limit. Each of the 4 cylinders displaces 40.8 ci (668 cc).
10:1 is in the range that usually runs on pump premium.
11 factory variants share these dimensions, rated from 185 to 187 hp across 2009–2019.
| Displacement | 163 ci / 2.7 L |
|---|---|
| Bore | 3.5433" |
| Stroke | 4.1339" |
| Cylinders | 4 |
| Configuration | I4 |
| Compression ratio | 10:1 * |
| Bore/stroke ratio | 0.857 |
* Compression ratio from a single source; not yet cross-verified.
| Fuel type | gas |
|---|---|
| Advertised HP | 185–187 hp |
| Years | 2009–2019 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2010 | 1AR-FE net | 187 @ 5800 | 186 lb-ft @ 4100 | — |
| 2011 | 1AR-FE net | 187 @ 5800 | 186 lb-ft @ 4100 | — |
| 2012 | 1AR-FE net | 187 @ 5800 | 186 lb-ft @ 4100 | — |
| 2013 | 1AR-FE net | 187 @ 5800 | 186 lb-ft @ 4100 | — |
| 2014 | 1AR-FE net | 185 @ 5800 | 184 lb-ft @ 4200 | — |
| 2015 | 1AR-FE net | 185 @ 5800 | 184 lb-ft @ 4200 | — |
| 2016 | 1AR-FE net | 185 @ 5800 | 184 lb-ft @ 4200 | — |
| 2017 | 1AR-FE net | 185 @ 5800 | 184 lb-ft @ 4200 | — |
| 2018 | 1AR-FE net | 185 @ 5800 | 184 lb-ft @ 4200 | — |
| 2019 | 1AR-FE net | 185 @ 5800 | 184 lb-ft @ 4200 | — |
Factory specification sheet.
| Bore/stroke character | 0.857 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 4,134 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 40.8 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 |
|---|---|---|
| 2009 | 187 hp | 1AR-FE |
| 2010 | 187 hp | 1AR-FE |
| 2011 | 187 hp | 1AR-FE |
| 2012 | 187 hp | 1AR-FE |
| 2013 | 187 hp | 1AR-FE |
| 2014 | 185 hp | 1AR-FE |
| 2015 | 185 hp | 1AR-FE |
| 2016 | 185 hp | 1AR-FE |
| 2017 | 185 hp | 1AR-FE |
| 2018 | 185 hp | 1AR-FE |
| 2019 | 185 hp | 1AR-FE |
2 factory vehicles, 2009–2019. Each year opens that model's engine table.