Porsche EA825 specs: 86 x 86 mm (3.3858 x 3.3858 in) bore and stroke, shared by all 2 versions. Displacement, compression and factory ratings, plus rod ratio.
| Displacement | 243.8–243.9 ci |
|---|---|
| Cylinders | 8 |
| Bore | 3.386" |
| Stroke | 3.386" |
| Compression | 10.1:1 |
| Advertised power | 550 hp |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| 40T Ea825 V8 | 243.9 ci | 3.3858" × 3.3858" | 10.1:1 | 550 |
| DWNA | 243.8 ci | 3.3858" × 3.3858" | 10.1:1 | 550 |
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.