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Chrysler 360ci specs: 360 ci (5.9L) 8-cylinder, 4.00 x 3.58 in (101.6 x 90.9 mm) bore and stroke, 11.4:1 compression. Rated 275 hp, 2009–2010. OHV.
The Chrysler 360ci is oversquare — the 4" bore exceeds the 3.58" stroke by 11.7% — 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 1.71 is in the range most production engines fall in. Each of the 8 cylinders displaces 45.0 ci (737 cc).
11.4:1 on iron heads is high enough that pump premium or better is normally required, and iron holds heat, so it is the less forgiving side of that line.
It is one of 2 engines in the Chrysler 360ci family, all of them 360 ci — the differences between them are in compression, heads and rating, not displacement. 2 factory variants share these dimensions, rated at 275 hp across 2009–2010.
| Displacement | 360 ci / 5.9 L |
|---|---|
| Bore | 4" |
| Stroke | 3.58" |
| Cylinders | 8 |
| Configuration | V8 |
| Compression ratio | 11.4:1 |
| Rod length | 6.123" |
| Rod ratio | 1.71 |
| Bore/stroke ratio | 1.117 |
| Piston deck clearance | 0.004" |
| Block material | cast iron |
|---|---|
| Head material | cast iron |
| Valvetrain | OHV |
| Fuel type | gas |
| Advertised HP | 275 hp |
| Years | 2009–2010 |
| Bore/stroke character | 1.117 — 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 | 1.71 — moderate — the range most production V8s fall in |
| Displacement per cylinder | 45.0 ci |
| Static compression | 11.4:1 — high enough that pump premium or better is normally required |
| Intake valve diameter | 2.02" |
|---|---|
| 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 | 275 hp | — |
| 2010 | 275 hp | — |