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H engine
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== Other engines named "H" == Subaru has marketed its [[flat-four engine|flat-four]] and [[flat-six engine|flat-six]] engines as "H4" and "H6" respectively. The letter "H" in this case refers to "horizontally-opposed", an alternative term for [[flat engine]]s; these engines can also be said to look like a "H" or conjoined "H"s, albeit from the top and in schematic form. The [[Saab H engine]] is a [[Straight-four engine|straight-four]] engine produced from 1981 to 2009. The letter "H" represents "high compression".
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