A prodigious 350-Nm of peak torque is delivered at a lower 1,600 rpm – providing smooth, free-breathing performance at any speed. And whilst meeting the ultra-clean EURO5 emission standards, the engine delivers even more torque compared to previous models. The result is a more compact combustion chamber and greater fuel efficiency, and combined with a higher pressure common rail fuel injection, an improved oxidizing catalyst with closed Diesel Particulate Filter (DPF), a variable nozzle turbo and electric power steering, these all help to reduce fuel consumption and CO2 emissions.Ĭeramic glow plugs also quicken starting in cold weather. The SUBARU BOXER, however, was originally designed with rigidity in mind, allowing the 92.0 mm x 75.0 mm bore and stroke of the 2.0-litre petrol four-cylinder engine to be changed to a square 86.0 mm x 86.0 mm design. When petrol engines are converted to diesel, strengthening of the engine block usually makes the engine bigger and heavier. The world's first commercial Horizontally-Opposed Diesel Engine developed for passenger vehicles is the SUBARU BOXER DIESEL. Both of these aspects combine to deliver a safer, more stable, and ultimately, more enjoyable experience on the road. Similarly, a symmetrically balanced engine increases the symmetrical balance of the entire car. In this design, the low centre of gravity engine lowers the centre of gravity of the entire car. The engine can be mounted lower in the vehicle than other engines, and weight balance on the left and right can be made almost exactly the same. The length and height of this engine layout can be kept shorter than a traditional in-line engine, and it is also lighter. This is because the engine can rotate freely at any given speed, delivering heart-gripping response to the driver.
The pistons face away from each other in a 180º symmetrical layout around the crankshaft and work to balance out each other’s vibrations, delivering a smooth, shudder-free feel.
Subaru firmly believes that the Horizontally-Opposed Engine is the optimum design for driving enjoyment.
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