See other engines in this family
Chrysler 370ci specs: 370 ci (6.1L) 8-cylinder, 4.055 x 3.58 in (103 x 90.9 mm) bore and stroke, 10.3:1 compression. Rated 340 hp, 2009–2010. OHV.
The Chrysler 370ci is oversquare — the 4.055" bore exceeds the 3.58" stroke by 13.3% — a layout that favors airflow and RPM over leverage at the crank. The 3.58" stroke puts mean piston speed at 4,000 ft/min around 6,700 RPM, which is where a production bottom end is generally considered at its limit. A rod ratio of 1.732 is in the range most production engines fall in. Each of the 8 cylinders displaces 46.3 ci (758 cc).
10.3:1 on iron heads is in the range that usually runs on pump premium; iron holds heat, so treat it as the less forgiving side of that range.
It is one of 4 engines in the Chrysler 370ci family, all of them 370 ci — the differences between them are in compression, heads and rating, not displacement. 2 factory variants share these dimensions, rated at 340 hp across 2009–2010.
| Displacement | 370 ci / 6.1 L |
|---|---|
| Bore | 4.055" |
| Stroke | 3.58" |
| Cylinders | 8 |
| Configuration | V8 |
| Compression ratio | 10.3:1 |
| Rod length | 6.2" |
| Rod ratio | 1.732 |
| Bore/stroke ratio | 1.133 |
| Piston deck clearance | 0.009" |
| Block material | cast iron |
|---|---|
| Head material | cast iron |
| Valvetrain | OHV |
| Fuel type | gas |
| Advertised HP | 340 hp |
| Years | 2009–2010 |
| Bore/stroke character | 1.133 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,580 ft/min — in the range typical of performance street engines |
| Rod ratio | 1.732 — moderate — the range most production V8s fall in |
| Displacement per cylinder | 46.3 ci |
| Static compression | 10.3:1 — in the range that usually runs on pump premium |
| Intake valve diameter | 2.08" |
|---|---|
| Exhaust valve diameter | 1.6" |
Each link opens the calculator with this engine's specs already filled in.
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|---|---|
| 2009 | 340 hp | — |
| 2010 | 340 hp | — |