Ford 1997 155 170HP Specs
Ford 1997 155 170HP engine specs: 155 ci (2.5L), 6-cylinder, 3.24" bore x 3.13" stroke, 10.5:1 compression.
Dimensions
| Displacement | 155 ci / 2.5 L |
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| Bore | 3.24" |
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| Stroke | 3.13" |
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| Cylinders | 6 |
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| Configuration | I6 |
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| Compression ratio | 10.5:1 |
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| Rod length | 5.437" |
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| Rod ratio | 1.737 |
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| Bore/stroke ratio | 1.035 |
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| Piston deck clearance | 0.004" |
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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 | 170 hp |
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| Years | 1997 |
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What these numbers mean
| Bore/stroke character | 1.035 — square — bore and stroke are within 5%, a balanced compromise |
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| Mean piston speed at 6,000 RPM | 3,130 ft/min — conservative for a street engine |
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| Rod ratio | 1.737 — moderate — the range most production V8s fall in |
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| Displacement per cylinder | 25.8 ci |
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| Static compression | 10.5:1 — in the range that usually runs on pump premium |
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Cylinder head
| Intake valve diameter | 1.26" |
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| Exhaust valve diameter | 1.024" |
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Similar engines
Source: NHRA blueprints — nhra.net blueprints
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