Mercedes-Benz 303ci specs: 96.5 x 85 mm (3.7992 x 3.3465 in) bore and stroke, shared by all 2 versions. Displacement, compression and factory ratings.
| Displacement | 303 ci |
|---|---|
| Cylinders | 8 |
| Bore | 3.799" |
| Stroke | 3.346" |
| Compression | 9.2–10.0:1 |
| Years | 1984–1994 |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| M119.974 | 303 ci | 3.7992" × 3.3465" | 10:1 | — |
| M117 | 303 ci | 3.7992" × 3.3465" | 9.2:1 | — |
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.