Boxer engines feature flat, opposing pistons that move in opposite directions for smooth operation. Subaru and Porsche are primary modern users, benefiting from low center of gravity and performance.
Subaru's WRX, Ascent, and Outback are the only new US models with a turbocharged flat-four boxer engine — and the WRX also ...
Subaru's understated flat-four boasts quite an impressive reliability streak.
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