Subaru Corporation, formerly Fuji Heavy Industries (FHI), recently commemorated 50 years of its famous flat-four engine. First introduced back in May14, 1966 for the model 1000, the company’s sole engine configuration has been powering all of Subaru’s current models from the Impreza, all the way to their flagship Outback crossover.

Ever since its introduction, Subaru has heavily invested in improving the flat-four’s performance and efficiency. As a review, it has horizontally-opposed cylinders which deviate from traditional inline and V engine layout. According to Subaru, the Boxer engine allows the pistons to cancel out the inertia of each other, which makes for a smoother, more balanced engine performance.

The 1966 Subaru 1000

Complementing the Boxer engine is Subaru’s proprietary Symmetrical All-Wheel Drive (AWD) system. Standard on all global models (except for the BRZ), it simultaneously provides stability and control when at speed, or trekking off-road.

Some of Subaru’s current Boxer engines in use today are the following:

FA20D – Subaru BRZ / Toyota 86

FA20F – Subaru Forester XT model

FB20B – Subaru Forester i models, Impreza, XV

FB25B – Subaru Legacy, Outback

EZ36D – Subaru Legacy, Outback

The Subaru AWD system paired with the Boxer engine

Subaru Corporation will continue enhancing the Boxer engine under their slogan ‘Confidence in Motion’. Moreover, the company is also seeking to improve its engineering prowess and market appeal through their ‘Enjoyment and Peace of Mind’ experience to customers worldwide.