Though it achieved a larger displacement, the FB25 machines possess some innovations and technologies that the FB20 engine has, including the piston stroke. In short, the Subaru FB25 engines are the larger version of the FB20 engine. The Subaru FB25 2.5L engine was based on the smaller capacity FB20 engine. Valvetrain: DOHC four valves per cylinder with AVCS.The seventh-generation 2020 Subaru Legacy and Outback adopted the revised direct injection FB25 as its base machine. The latter also featured direct injection, resulting in a slight boost in power and fuel economy. There are two versions for the FB25 engine – the FB25B, which was the initial release, and the FB25D, the latest version and introduced at the 2018 New York International Autoshow. It is suited for a compacted low center of gravity vehicles.Įxcellent configuration for cornering, absorbing G’s, and putting a brand for a sporty type of vehicle. Some of the notable characteristics of the FB engines are thicker cylinder walls, new cylinder heads, narrower chain-driven cam angles leading to a more efficient machine. This engine features many similarities from the initial FB20 engine, but Subaru also integrated a lot of new technologies and innovations. The engine is a more robust modification of the FV20, the first engine to introduce the FB family to the automotive world. The engine is a 2.5 L non-turbo horizontally-opposed (boxer) engine, four-cylinder motor, and occupied the seat of the Subaru EJ25 engine in Subaru Legacy and Forester. It was first produced in 2010 at Subaru’s Gunma Oizumi factory, developed exclusively for the FB engines. The Subaru FB25 engine is a new generation engine made by Subaru. Subaru FB engines are far more advanced and more efficient than the previous engines.Īpart from that, the engines received several changes that took the engine to the top. It is a member of Subaru’s third-generation FB boxer and FB20, FA20D, FA20F, AND FA20E ENGINES. The Subaru FB25 engine 2.5 L engine boxer engine replaced the EJ253 engine.
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