Jeep 4.0L HO Specs
Jeep 4.0L HO engine specs: 242 ci (4L), 6-cylinder, 3.8752" bore x 3.4098" stroke, 8.8:1 compression.
Dimensions
| Displacement | 242 ci / 4 L |
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| Bore | 3.8752" |
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| Stroke | 3.4098" |
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| Cylinders | 6 |
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| Compression ratio | 8.8:1 |
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| Bore/stroke ratio | 1.136 |
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Construction
| Block material | cast iron |
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| Head material | cast iron |
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| Valvetrain | OHV |
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| Fuel type | gas |
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| Advertised HP | 190 hp |
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What these numbers mean
| Bore/stroke character | 1.136 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
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| Mean piston speed at 6,000 RPM | 3,410 ft/min — conservative for a street engine |
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| Displacement per cylinder | 40.3 ci |
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| Static compression | 8.8:1 — low by modern standards, generally happy on regular pump fuel |
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Vehicles (5)
- Jeep Cherokee (XJ)
- Jeep Grand Cherokee (ZJ/WJ)
- Jeep Wrangler (YJ/TJ)
- Jeep Grand Cherokee (ZJ)
- Jeep Wrangler (TJ)
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