Audi EA888 specs: 82.5 x 92.8 mm (3.2480 x 3.6535 in) bore and stroke, shared by all 2 versions. Displacement, compression and factory ratings.
| Displacement | 121.9 ci |
|---|---|
| Cylinders | 4 |
| Bore | 3.248" |
| Stroke | 3.654" |
| Compression | 9.6–11.7:1 |
| Advertised power | 200–265 hp |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| EA888 · 3.248" × 3.654" · 9.6:1 | 121.9 ci | 3.248" × 3.6535" | 9.6:1 | 200–220 |
| EA888 · 3.248" × 3.654" · 11.65:1 | 121.9 ci | 3.248" × 3.6535" | 11.65:1 | 252–265 |
Compression spans 9.6:1 to 11.65:1, so fuel requirements differ meaningfully between members — worth checking before assuming parts interchange.
All are undersquare — stroke larger than bore, favouring torque low in the range.
Each engine page carries rod ratio, mean piston speed, bore/stroke character and cylinder head specs where published, and links into the calculators with its dimensions already filled in.