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Volkswagen CPRA/CJXC specs: 1.8L (109.8 ci) 4-cylinder, 82.5 x 84.2 mm (3.2480 x 3.3150 in) bore and stroke, 9.6:1 compression. Rated 170 hp, 2015–2018.
The Volkswagen CPRA/CJXC is close to square: 3.248" bore against 3.315" stroke, within 2.0%, which splits the difference between a high-revving layout and a torque layout. The 3.315" stroke does not reach 4,000 ft/min of mean piston speed until about 7,250 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 4 cylinders displaces 27.5 ci (450 cc).
9.6:1 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 31 engines in the EA888 family, the smallest at 109.8 ci. 4 factory variants share these dimensions, rated at 170 hp across 2015–2018.
| Displacement | 109.8 ci / 1.8 L |
|---|---|
| Bore | 3.248" |
| Stroke | 3.315" |
| Cylinders | 4 |
| Configuration | I4 |
| Compression ratio | 9.6:1 |
| Bore/stroke ratio | 0.98 |
| Block material | cast iron |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 170 hp |
| Years | 2015–2018 |
| Bore/stroke character | 0.980 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,315 ft/min — conservative for a street engine |
| Displacement per cylinder | 27.4 ci |
| Static compression | 9.6:1 — 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 |
|---|---|---|
| 2015 | 170 hp | CPRA/CJXC |
| 2016 | 170 hp | CPRA/CJXC |
| 2017 | 170 hp | CPRA/CJXC |
| 2018 | 170 hp | CPRA/CJXC |
4 factory vehicles, 2014–2019. Each year opens that model's engine table.