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Dodge 3.2L Pentastar V6 specs: 195.3 ci (3.2L) 6-cylinder, 3.622 x 3.118 in (92 x 79.2 mm) bore and stroke, 10.7:1 compression. Rated 271 hp. DOHC.
The Dodge 3.2L Pentastar V6 is oversquare — the 3.622" bore exceeds the 3.1181" stroke by 16.2% — a layout that favors airflow and RPM over leverage at the crank. The 3.1181" stroke does not reach 4,000 ft/min of mean piston speed until about 7,700 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 32.6 ci (533 cc).
10.7:1 on aluminum heads is in the range that usually runs on pump premium; aluminum sheds heat faster than iron, which makes the same number a little more forgiving.
It is one of 4 engines in the Pentastar family, the smallest at 195.3 ci. Factory fitments include the Jeep Cherokee KL.
| Displacement | 195.3 ci / 3.2 L |
|---|---|
| Bore | 3.622" |
| Stroke | 3.1181" |
| Cylinders | 6 |
| Compression ratio | 10.7:1 |
| Bore/stroke ratio | 1.162 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 271 hp |
| Bore/stroke character | 1.162 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,118 ft/min — conservative for a street engine |
| Displacement per cylinder | 32.6 ci |
| Static compression | 10.7:1 — in the range that usually runs on pump premium |
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