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Mazda SKYACTIV-G 2.0 specs: 1.998L (122 ci) 4-cylinder, 83.5 x 91.2 mm (3.2874 x 3.5906 in) bore and stroke. Rated 155 hp, 2012–2022.
The Mazda SKYACTIV-G 2.0 is undersquare — the 3.5906" stroke exceeds the 3.2874" bore by 8.4% — a layout that trades peak RPM for leverage and torque low in the range. The 3.5906" stroke puts mean piston speed at 4,000 ft/min around 6,700 RPM, which is where a production bottom end is generally considered at its limit. Each of the 4 cylinders displaces 30.5 ci (500 cc).
It is one of 19 engines in the Skyactiv-G family, sitting between the 91.3 ci and 201.4 ci members. 9 factory variants share these dimensions, rated at 155 hp across 2012–2022.
| Displacement | 122 ci / 1.998 L |
|---|---|
| Bore | 3.2874" |
| Stroke | 3.5906" |
| Cylinders | 4 |
| Configuration | I4 |
| Compression ratio | 12–13:1 (published figures vary) |
| Bore/stroke ratio | 0.916 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Redline | 6,500 rpm (factory limit) |
| Advertised HP | 155 hp |
| Years | 2012–2022 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2012 | SKYACTIV-G 2.0 net | 155 @ 6000 | 148 lb-ft @ 4100 | 12:1 |
| 2013 | SKYACTIV-G 2.0 net | 155 @ 6000 | 148 lb-ft @ 4100 | 12:1 |
| 2014 | SKYACTIV-G 2.0 net | 155 @ 6000 | 150 lb-ft @ 4000 | 13:1 |
| 2015 | SKYACTIV-G 2.0 net | 155 @ 6000 | 150 lb-ft @ 4000 | 13:1 |
| 2016 | SKYACTIV-G 2.0 net | 155 @ 6000 | 150 lb-ft @ 4000 | 13:1 |
| 2017 | SKYACTIV-G 2.0 net | 155 @ 6000 | 150 lb-ft @ 4000 | 13:1 |
| 2018 | SKYACTIV-G 2.0 net | 155 @ 6000 | 150 lb-ft @ 4000 | 13:1 |
| 2022 | SKYACTIV-G 2.0 net | 155 @ 6000 | 150 lb-ft @ 4000 | 13:1 |
Factory specification sheet.
| Bore/stroke character | 0.916 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,591 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 30.5 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 |
|---|---|---|
| 2012 | 155 hp | SKYACTIV-G 2.0 |
| 2013 | 155 hp | SKYACTIV-G 2.0 |
| 2014 | 155 hp | SKYACTIV-G 2.0 |
| 2015 | 155 hp | SKYACTIV-G 2.0 |
| 2016 | 155 hp | SKYACTIV-G 2.0 |
| 2017 | 155 hp | SKYACTIV-G 2.0 |
| 2018 | 155 hp | SKYACTIV-G 2.0 |
| 2021 | 155 hp | SKYACTIV-G 2.0 |
| 2022 | 155 hp | SKYACTIV-G 2.0 |
2 factory vehicles, 2012–2022. Each year opens that model's engine table.