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The following description of the advantages of a horizontally-opposed engine comes from Subaru's website (subaru-global.com):
"What is the ideal engine for the greatest driving pleasure? Subaru believes that the answer is the Horizontally-Opposed Engine. This engine, with a layout that positions the pistons laterally to the crankshaft at an angle of 180 degrees, delivers multiple benefits. Why is this Horizontally-Opposed Engine the ideal power unit? Because the opposed pistons mutually counteract vibration and give superior balance. This results in smoother engine performance throughout all speed ranges - with no need for a balancer shaft - as well as giving unparalleled response to the driver. The next advantages are the size and weight. Obviously, the Horizontally-Opposed piston layout means an engine that is both shorter and lower than a conventional in-line design. In addition, you have a more compact shape, lighter weight and the ability to mount the engine much lower in the chassis. The overall result is a low centre of gravity and balance that cannot be matched with other engine types." Joe Fillip '95 L AWD ("The Wayback Machine") Swarthmore, PA |
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