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DJ,
Less cylinders inline is the most efficient in my opinion per equal displacement. There are less frictional losses.
No angular torque loss & less rotating mass than a V design. The V design exists for easier packaging in a chassis than an inline engine. Less valvetrain complexity, weight & cost.
Notice how GM went back to all-new inline 5cyl & 6cyl engines in the Trailblazer & Colorado?
That is my two cents.
Cowspots
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