Mazda PY-VPTS (Skyactiv-X) Specs
Mazda PY-VPTS (Skyactiv-X) engine specs: 152.4 ci (2.498L), 4-cylinder, 3.5039" bore x 3.937" stroke, 16.3:1 compression.
Dimensions
| Displacement | 152.4 ci / 2.498 L |
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| Bore | 3.5039" |
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| Stroke | 3.937" |
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| Cylinders | 4 |
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| Compression ratio | 16.3:1 |
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| Bore/stroke ratio | 0.89 |
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Construction
| Block material | aluminum |
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| Head material | aluminum |
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| Valvetrain | DOHC |
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| Fuel type | gas |
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| Advertised HP | 186 hp |
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What these numbers mean
| Bore/stroke character | 0.890 — undersquare — stroke exceeds bore, which favours low-end torque |
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| Mean piston speed at 6,000 RPM | 3,937 ft/min — in the range typical of performance street engines |
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| Displacement per cylinder | 38.1 ci |
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| Static compression | 16.3:1 — high enough that pump premium or better is normally required |
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