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Chrysler 392ci (2010) · 375 hp specs: 392 ci (6.4L) 8-cylinder, 4.055 x 3.795 in (103 x 96.4 mm) bore and stroke, 10.5:1 compression. Rated 375 hp, 2010. OHV.
The Chrysler 392ci (2010) · 375 hp is oversquare — the 4.055" bore exceeds the 3.795" stroke by 6.9% — a layout that favors airflow and RPM over leverage at the crank. The 3.795" stroke puts mean piston speed at 4,000 ft/min around 6,300 RPM, which is where a production bottom end is generally considered at its limit. A rod ratio of 1.634 is in the range most production engines fall in. Each of the 8 cylinders displaces 49.0 ci (803 cc).
10.5:1 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 5 engines in the Chrysler 392ci family, all of them 392 ci — the differences between them are in compression, heads and rating, not displacement.
| Displacement | 392 ci / 6.4 L |
|---|---|
| Bore | 4.055" |
| Stroke | 3.795" |
| Cylinders | 8 |
| Configuration | V8 |
| Compression ratio | 10.5:1 |
| Rod length | 6.2" |
| Rod ratio | 1.634 |
| Bore/stroke ratio | 1.069 |
| Piston deck clearance | 0.012" |
| Block material | cast iron |
|---|---|
| Head material | cast iron |
| Valvetrain | OHV |
| Fuel type | gas |
| Advertised HP | 375 hp |
| Years | 2010 |
| Bore/stroke character | 1.069 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,795 ft/min — in the range typical of performance street engines |
| Rod ratio | 1.634 — moderate — the range most production V8s fall in |
| Displacement per cylinder | 49.0 ci |
| Static compression | 10.5:1 — in the range that usually runs on pump premium |
| Intake valve diameter | 2.1" |
|---|---|
| Exhaust valve diameter | 1.6" |
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