Chrysler 370ci specs: 4.055 x 3.58 in (103 x 90.9 mm) bore and stroke, shared by all 4 versions. Displacement, compression and factory ratings.
| Displacement | 370 ci |
|---|---|
| Cylinders | 8 |
| Bore | 4.055" |
| Stroke | 3.580" |
| Compression | 10.3–12.6:1 |
| Advertised power | 340–425 hp |
| Years | 2005–2010 |
| Cylinder head data | 2 of 4 engines |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| Chrysler 370ci · 4.055" × 3.580" · 10.3:1 | 370 ci | 4.055" × 3.58" | 10.3:1 | 340 |
| Chrysler 370ci · 4.055" × 3.580" · 12.6:1 | 370 ci | 4.055" × 3.58" | 12.6:1 | 385 |
| SRT 6.1 | 370 ci | 4.055" × 3.58" | — | 425 |
| Hemi 6.1 SRT | 370 ci | 4.055" × 3.58" | — | 420 |
Compression spans 10.3:1 to 12.6:1, 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.