Lincoln 181ci specs: 3.504 x 3.13 in (89 x 79.5 mm) bore and stroke. Displacement, compression and factory ratings for each, plus rod ratio and piston speed.
| Displacement | 181 ci |
|---|---|
| Cylinders | 6 |
| Bore | 3.504" |
| Stroke | 3.130" |
| Advertised power | 221 hp |
| Years | 2006 |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| Duratec 30 | 181 ci | 3.5039" × 3.1299" | — | 221 |
This family is represented by a single engine in the database: 181 ci, 6 cylinders, a 3.5039" × 3.1299" bore and stroke.
All are oversquare — bore larger than stroke, which favours revs over low-end torque.
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.