Chevrolet Chevr 2006 145 171HP engine specs: 145 ci (2.4L), 4-cylinder, 3.465" bore x 3.858" stroke, 10.4:1 compression.
| Displacement | 145 ci / 2.4 L |
|---|---|
| Bore | 3.465" |
| Stroke | 3.858" |
| Cylinders | 4 |
| Configuration | I4 |
| Compression ratio | 10.4:1 |
| Rod length | 5.661" |
| Rod ratio | 1.467 |
| Bore/stroke ratio | 0.898 |
| Piston deck clearance | 0.025" |
| Block material | cast iron |
|---|---|
| Head material | cast iron |
| Valvetrain | OHV |
| Fuel type | gas |
| Advertised HP | 171 hp |
| Years | 2006 |
| Bore/stroke character | 0.898 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,858 ft/min — in the range typical of performance street engines |
| Rod ratio | 1.467 — short — more side loading and piston dwell at TDC, typical of stroker combinations |
| Displacement per cylinder | 36.3 ci |
| Static compression | 10.4:1 — in the range that usually runs on pump premium |
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Source: NHRA blueprints — nhra.net blueprints