Both engines' internals are identical; Mazda turns up the boost on the more powerful variant by roughly 5 psi to about 19 psi and adjusts other engine parameters to take advantage of higher-octane fuel. The plug-in hybrid mates a 189-hp 2.5-liter turbo four with a 173-hp electric motor for a combined 323 horsepower and 369 pound-feet of torque
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mazda 6 2.5 lpg forum
