Chrysler 345ci specs: 3.92 x 3.58 in (99.6 x 90.9 mm) bore and stroke, shared by all 3 versions. Displacement, compression and factory ratings.
| Displacement | 345 ci |
|---|---|
| Cylinders | 8 |
| Bore | 3.920" |
| Stroke | 3.580" |
| Compression | 10.5–12.7:1 |
| Advertised power | 300–363 hp |
| Years | 2005–2023 |
| Cylinder head data | 2 of 3 engines |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| Chrysler 345ci · 3.920" × 3.580" · 10.5:1 | 345 ci | 3.92" × 3.58" | 10.5:1 | 300–345 |
| Chrysler 345ci · 3.920" × 3.580" · 12.7:1 | 345 ci | 3.92" × 3.58" | 12.7:1 | 305 |
| Hemi 5.7 | 345 ci | 3.92" × 3.58" | — | 340–363 |
Compression spans 10.5:1 to 12.7:1, so fuel requirements differ meaningfully between members — worth checking before assuming parts interchange.
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.