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Subaru Global
The Subaru Difference  
Tuesday, 11th August 2020
Only from Subaru
Symmetrical AWD
The AWD Advantage
Subaru Boxer
Driving Dexterity
Refined Dynamics
Controlled Cornering
Total Safety
Natural Poise
Subaru Boxer
The advantages of a Horizontally-Opposed Engine
Subaru's Horizontally-Opposed Engines are what make the whole drivetrain layout possible. The key to this flat engine configuration is that its opposing pistons effectively balance out each others' vibrations. Compared with In-line or V-type engines, this gives smooth, seamless, fluent power delivery right through the rev range. (Once again, symmetry is the secret). Even more important, the design is shorter and shallower than other engines, which means we can make ours more compact, lightweight and very rigid. In turn, this lets us fit the engine way down in the chassis, to give that very low centre of gravity. Both In-line and V-type plants have advantages and disadvantages - as you can see below. But the built-in benefits of the 'Boxer' engine have proved to Subaru (and Subaru owners) that this is the one true way to harness performance and ally it with remarkable drivability. Whatever the road, whatever the conditions, whatever the challenges, we firmly believe that this is the route to genuine all-round refinement.
Subaru Horizontally-Opposed Engine
In-line Engine
V-type Engine
  This layout is perfectly sound according to engineering principles. Balance is good, but in practice, it's difficult to keep rigidity and avoid unwanted vibrations, because of the pistons changing from upward to downward movement.   The idea is right in theory. Make the engine more compact, and you should also help counteract the tendency for pistons to fight against each other. However, in the high-rev, high-torque bands, you still tend to experience unwanted vibrations.
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