Subaru celebrates 20 million production milestone of AWD vehicles  

Updated Jul 09, 2021 | Same topic: Automotive Industry Updates

Subaru's All-Wheel-Drive technology has been around since 1972.

Subaru Corporation reaches a landmark in its history, as it crossed the 20-million-unit milestone in June this year for all-wheel-drive (AWD) vehicles produced worldwide. The drivetrain has been a defining characteristic of products made by the Japanese transport conglomerate’s automobile manufacturing division, Subaru

Subaru Symmetrical All-Wheel Drive Explained

The company’s achievement is rooted in the introduction of the Subaru Leone 4WD Estate trim, in September 1972. Apart from being Japan’s first mass-produced AWD passenger car, this was also the earliest iteration of Subaru’s Symmetrical All-Wheel-Drive (SAWD) layout, which was originally devised as a part-time system. 

Almost all of Subaru’s automotive models to date are equipped with SAWD as standard equipment, comprising a longitudinally mounted horizontally opposed engine (marketed as the Boxer engine) and transmission which are balanced over the front axle, connected to a drivetrain with half-axles of equal length. 

Subaru Leone

Before the Subaru Leone, AWD was reserved only for specialized vehicles in Japan

The resulting low center of gravity and balanced weight distribution of the setup benefit traction and stability, which the company says delivers impressive driving performance in a range of road and weather conditions. Current versions of SAWD are full-time in nature.      

With an existence of almost 50 years running, the technology has been continuously refined by Subaru. The first full-time SAWD system was introduced on the Subaru XT in 1986, followed in 1987 by electronically controlled active torque split AWD with a torque distribution range from 60:40 to 50:50. 

Subaru SAWD

Subaru's AWD layout balances weight distribution on its models

Variable torque split AWD made its appearance on the Subaru SVX coupé in 1991, featuring a rear-biased torque distribution that helped mitigate understeer, a common occurrence in AWD vehicles. The application of vehicle dynamics control or VDC allowed even a single wheel to receive up to 100 percent of torque.

Although SAWD is commonly associated with Subaru’s Lineartronic continuously variable transmission (CVT), models equipped with a manual transmission utilize a viscous limited-slip center differential that evenly distributes torque between the front and rear.  

e-Boxer powertrain

The e-Boxer powertrain further improves AWD capabilities and weight distribution

Subaru’s e-Boxer hybrid system adds an electric motor powered by a compact lithium-ion battery, allowing for more precise control of SAWD while improving overall weight distribution. The upcoming all-electric Solterra SUV in 2022 will feature SAWD capability enhanced with electrification technologies.    
 
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Joseph Paolo Estabillo

Joseph Paolo Estabillo

Author

Joseph has been a member of various car clubs since he got his driver's license in 2004 – old enough to remember riding in taxicabs with analog meters, but his fascination with cars goes way back. After nearly two decades of working in broadcast media, he shifted gears by coming on board as Philkotse’s first Filipino member and staff writer in 2017.

Apart from his role in Philkotse as Content Team Lead, Joseph has written episodes for Drive, which has been airing on CNN Philippines for five seasons running. He has also delivered content for various car dealerships based in the U.S., spanning multiple brands such as Alfa Romeo, Maserati, Jeep, Dodge, among others.

Keeping his hopes high and his revs low, he dreams about owning a Kei car when he retires. Hates slow parkers.

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