Subaru 15 NA Specs
Subaru 15 NA engine specs: 91.1 ci (1.5L), 4-cylinder, 3.3465" bore x 2.5906" stroke, 9.5:1 compression.
Dimensions
| Displacement | 91.1 ci / 1.5 L |
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| Bore | 3.3465" |
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| Stroke | 2.5906" |
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| Cylinders | 4 |
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| Compression ratio | 9.5:1 |
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| Bore/stroke ratio | 1.292 |
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Construction
| Block material | aluminum |
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| Head material | aluminum |
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| Valvetrain | SOHC |
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| Fuel type | gas |
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| Advertised HP | 97 hp |
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What these numbers mean
| Bore/stroke character | 1.292 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
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| Mean piston speed at 6,000 RPM | 2,591 ft/min — conservative for a street engine |
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| Displacement per cylinder | 22.8 ci |
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| Static compression | 9.5:1 — in the range that usually runs on pump premium |
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Vehicles (3)
- Subaru Impreza (Japan)
- Subaru Impreza (JDM)
- Subaru Impreza
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