On February 17, Fuji Heavy Industries announced that they have achieved a total production volume of 15 million units of horizontally-opposed engines. The company first developed water-cooled horizontally-opposed four-cylinder aluminum engines in 1966. It will soon reach its 49th year of operation since it first installed one into the Subaru 1000 in May of 1966.
The horizontally-opposed engine is positioned in such a way that the pistons are opposite each other. The vehicle’s rotational balance in low frequency is great; it is also possible to obtain a rotational speed that smoothly rises up to a high RPM because the opposing pistons cancel out each other’s force of inertia.The engine’s overall height is low, but it contributes to the center of gravity in the vehicle’s body. Furthermore, it also contributes to higher driving stability and handling performance. Subaru is particular on the characteristics of the horizontally-opposed engine and improving it over and over even until now. They have been working to expand it into various models.
In addition, the total production volume of Symmetrical AWD had reached 14 million units last month after its was first mounted in the Subaru Leone 4WD Estate van that was released in September 1972. The Symmetrical AWD has achieved a stable high-speed driving and agile cornering through a synergy of excellent driving stability and running performance. Moreover, the weight that results from the symmetrical powertrain is balanced although the horizontally-opposed engine is positioned vertically. This has become the core of the technology, supporting ideas of Subaru regarding pleasurable driving and safety.
(Translated by Natassia Jeronne D. Martinez)