Quote:
Originally Posted by Dzmitry
Yes, they will absolutely not be different. Subaru claimed it to be 13.5:1 on their ads upon release. But Toyota made an official claim of 12.5:1 on their release. I would very highly bet against 13.5:1.
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Why? The ND2 Miata is 13:1 and the Skyactiv engines are 14:1.
Modern ECU controls and DI have allowed dramatically increased compression and efficiency.