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Audi CEPA specs: 2.5L (152.6 ci) 5-cylinder, 82.5 x 92.8 mm (3.2480 x 3.6535 in) bore and stroke, 10.1:1 compression. Rated 360 hp, 2012–2013.
The Audi CEPA is undersquare — the 3.6535" stroke exceeds the 3.248" bore by 11.1% — a layout that trades peak RPM for leverage and torque low in the range. The 3.6535" stroke puts mean piston speed at 4,000 ft/min around 6,550 RPM, which is where a production bottom end is generally considered at its limit. Each of the 5 cylinders displaces 30.5 ci (500 cc).
10.1:1 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 2 engines in the EA855 family, all of them 152.6 ci — the differences between them are in compression, heads and rating, not displacement. 2 factory variants share these dimensions, rated at 360 hp across 2012–2013.
| Displacement | 152.6 ci / 2.5 L |
|---|---|
| Bore | 3.248" |
| Stroke | 3.6535" |
| Cylinders | 5 |
| Compression ratio | 10.1:1 |
| Bore/stroke ratio | 0.889 |
| Block material | cast iron |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 360 hp |
| Years | 2012–2013 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2012 | CEPA net | 360 @ 5500 | 343 lb-ft @ 1650 | 10.1:1 |
Factory specification sheet.
| Bore/stroke character | 0.889 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,654 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 30.5 ci |
| Static compression | 10.1:1 — 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 |
|---|---|---|
| 2012 | 360 hp | CEPA |
| 2013 | — | CEPA |
1 factory vehicle, 2012–2013. Each year opens that model's engine table.