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Japanese firm to showcase hybrid version of boxer engine as it gears up for electrified future

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Subaru will launch two hybrid-engined models, powered by an electrified version of its boxer engine, at the Geneva motor show in March.

The two unspecified models, which will be branded as e-boxer machines, will be the firm’s first electrified cars in the European market. While Subaru has yet to reveal which cars they will be fitted to, they are likely to be machines in the current range. It unveiled a Forester Advance Sport Concept, which previewed an STi-tuned version of the SUV with an e-boxer powertrain, at the Tokyo Auto Salon recently.

Subaru’s Boxer longitudinally mounted flat four boxer engine features two rows of pistons mounted flat horizontally opposed to each other, giving the unit a lower centre of gravity. Subaru uses the arrangement because it believes it improves handling, with the opposing pistons reducing engine vibration.

It is not yet known which size of boxer engine Subaru will use for the e-boxer powertrain, or whether the system will be a pure hybrid or a plug-in. The firm’s website refers to the powertrain as ‘hybrid, the Subaru way.’

The firm has previously hinted that a future WRX STi could use a plug-in hybrid powertrain, because increasingly strict emissions regulations would rule out the use of the 2.5-litre turbocharged boxer engine in the most recent model.

While Subaru has not previously sold a hybrid in the UK, it does have experience of the powertrain. In 2013 it launched an XV Hybrid in Japan and the US. That machine mated a 2.0-litre boxer engine with 148bhp mated to a 14bhp electric motor. The firm also launched a plug-in Crosstrek Hybrid in the US last year.

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Next Subaru WRX STi set for hybrid revolution

Subaru XV Hybrid first drive (from 2013)

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James Attwood

James Attwood, digital editor
Title: Associate editor

James is Autocar’s associate editor, and has more than 20 years of experience of working in automotive and motorsport journalism. He has been in his current role since September 2024, and helps lead Autocar's features and new sections, while regularly interviewing some of the biggest names in the industry. Oh, and he once helped make Volkswagen currywurst. Really.

Before first joining Autocar in 2017, James spent more than a decade in motorsport journalist, working on Autosport, autosport.com, F1 Racing and Motorsport News, covering everything from club rallying to top-level international events. He also spent 18 months running Move Electric, Haymarket's e-mobility title, where he developed knowledge of the e-bike and e-scooter markets. 

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drewgrant 17 December 2025

Hybrid or plug-in, Subaru is clearly trying to keep up with the times! Let’s hope they don’t lose that signature boxer engine feel. If you’re into gaming and need a useful tool, take a peek at this The Forge Calculator.

drewgrant 17 December 2025

Oh, Subaru’s going electrified—finally joining the future party! Maybe while you wait for the e-boxers, you can have some fun with a little randomness. Check this out: Random pokemon generator

SarahScott 18 November 2025

Subaru uses the avatar world arrangement because it believes it improves handling