Jeep AMC Straight-6 9.2:1 Specs
Jeep AMC Straight-6 · 3.875" × 3.410" · 9.2:1 engine specs: 242 ci (4L), 6-cylinder, 3.8752" bore x 3.4098" stroke, 9.2:1 compression.
Dimensions
| Displacement | 242 ci / 4 L |
|---|
| Bore | 3.8752" |
|---|
| Stroke | 3.4098" |
|---|
| Cylinders | 6 |
|---|
| Compression ratio | 9.2:1 |
|---|
| Bore/stroke ratio | 1.136 |
|---|
Construction
| Block material | cast iron |
|---|
| Head material | cast iron |
|---|
| Valvetrain | OHV |
|---|
| Fuel type | gas |
|---|
| Advertised HP | 177–190 hp |
|---|
What these numbers mean
| Bore/stroke character | 1.136 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|
| Mean piston speed at 6,000 RPM | 3,410 ft/min — conservative for a street engine |
|---|
| Displacement per cylinder | 40.3 ci |
|---|
| Static compression | 9.2:1 — low by modern standards, generally happy on regular pump fuel |
|---|
Run the numbers for this engine
Each link opens the calculator with this engine's specs already filled in.
Variants sharing these dimensions (2)
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|
| — | 177 hp | 4.0L MPFI |
| — | 190 hp | 4.0L PowerTech, ERH |
Vehicles (12)
- Jeep Cherokee (XJ)
- Jeep Comanche (MJ)
- Jeep Grand Cherokee (ZJ)
- Jeep Cherokee XJ
- Jeep Grand Cherokee ZJ/WJ
- Jeep Wrangler YJ/TJ
- Jeep Grand Cherokee (WJ)
- Jeep Wrangler (TJ)
- Jeep Liberty (KJ)
- Jeep Wrangler YJ
- Jeep Comanche MJ
- Jeep Wrangler (YJ)
Similar engines
← All AMC Straight-6 engines