Subaru's Third-Gen Engine Delivers More Power And Efficiency.
Fuji Heavy Industries Ltd. (FHI) has developed the third-generation Boxer engine that will power Subaru products for years to come. First employed in the Subaru 1000 in 1966, the boxer engine features horizontally opposed cylinders. This design delivers a lightweight, compact engine with a low center of gravity. The second-generation boxer engine was introduced in the first Legacy models in 1989.
The new-generation Subaru Boxer engine has a revised bore and stroke, lightweight pistons and connecting rods, block and head cooling advancements, as well as the use of AVCS (Active Valve Control System) on both intake and exhaust valves.
Improved fuel efficiency has been achieved through optimization of intake port configuration and the addition of partitions inside ports, the use of TGV (Tumble Generated Valve) and the use of an EGR (Exhaust Gas Recirculation) cooler. The new four-cylinder plant will be built in displacements of 2.0 liters and 2.5 liters. We're expecting to see turbocharged variations of this engine end up in future-generation WRX and STI models.