• Sep 1, 2010
According to Automotive News, Subaru is set to release a new, more fuel-efficient version of its boxer four-cylinder engine. The powerplant should be available in both 2.0-liter and 2.5-liter configurations and will be able to offer up a 10-percent boost in fuel economy over its predecessors. The report doesn't detail exactly how the engine goes about gaining its new found efficiency, but it does say the changes are the first significant revision of the company's boxer architecture in two decades.

A Fuji Heavy Industries spokesperson confirmed that the new powerplant is coming, but wouldn't go so far as to say which models would benefit from the new tech. Automotive News reports that other sources claim that the thrifty four-pot will first show up in the Forester both in the U.S. and Japan, paired with a CVT gearbox. The new engine will then begin to crop up in models like the Legacy and Impreza here in the States and the Exiga minivan on Subaru's home turf.

[Source: Automotive News - sub. req.]


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  • 31 Comments
      • 4 Years Ago
      I love my new Scooby. But thinking about the numbers, 10% isn't really that much of an increase. I'm rated at 18/25 right now. 10% on top of that is 20/28 (rounding up). Can we really call that "next gen". Still, for all-time AWD and good hp/tq, I'm not complaining at all. :)
        • 4 Years Ago
        Ten percent is a big deal. How much did you spend on fuel last year?
      • 4 Years Ago
      Interesting. I can't wait to see how well hybrid AWD vehicles are received. I'd like to see performance increases from hybrid systems also. Hopefully we will see an electric motor component added to the WRX at some point soon that will add a lot of HP.
      • 4 Years Ago
      The fuel economy is good news, especially with the EPA's new A-F grading system.

      I'm sort of hoping they offer a version with a low-range version of the CVT like the Patriot FD II has. A really high-quality crossover with a bit more ability off-road would do a lot for me. It would lose some mileage but not nearly as much as you would lose buying an SUV like a Toyota 4Runner.
        • 4 Years Ago
        The European market Forester has a low range coupled to the 5 speed manual, but it's not a very deep reduction. Still
        Makes it nice when you're dealing with very steep hills.
      • 4 Years Ago
      I'm betting it's Direct Injected,.....and revised heads,electric water pump.That alone is worth 10%.
      My 97 DD Impreza gets around 20-26mpg,....with 150k miles and a roof rack.

      I love Subies,....and did before they even brought the rally cars here.

      Just plz,.....lose the frameless windows,....they all today still sound like my old 85 wagon's doors when they shut.
        • 4 Years Ago
        No direct injection if what I was told is correct.
        • 4 Years Ago
        Current Generation Subaru's don't have frameless windows.
        • 4 Years Ago
        Definitely no. (and I actually prefer frameless windows, if given the choice. nicer, lighter doors, the roof structure doesn't need to accomodate window channel fitment, and the window channels don't get bent and crimped into the pillar structures in accidents, making it more likely for the doors to not be crimped closed.)

        If subaru had incorporated the nudge-down, nudge-up window mechanisms, to seat the glass into the seals, the complaints about wind noise would be a non-issue. I don't find the sound of my legacy doors closing to be abnormal, so I guess I don't identify with that particular complaint.

        The Tribeca was the first to get away from frameless, followed by the current gen Impreza. (Quasimodo, the hunchback of the auto industry), and then followed by the Forester. The 2010 Legacy and Outback,... or should I say Outback, and it's lower-riding sedan bodystyle, that they call Legacy, left frameless windows behind for their 2010 new models.

        There are no frameless window Subarus anymore. The only framed-window Subaru that earned it's window frames was the SVX, which wrapped the glass over the window frame structure, and seated the window frames to the sides of the roof structure. The window glass meets the roof skin with a thin outer seal, and a thicker weatherstrip inside that. It is almost completely flush-fitting, except the thin joint-channel for window-in-a-window, and made the car VERY aerodynamic.
        • 4 Years Ago
        All the current Subarus don't have frameless windows.
        • 4 Years Ago
        @mk15
        um...no?
      • 4 Years Ago
      I'm still waiting for Subaru to bring their diesel engine over for the US market. I would be quite content with them making it a 49 state car. Since California's emission requirements seem to be the main culprit of 'why' they won't bring it over...
      • 4 Years Ago
      Show the solidity of the old design if it made it this long.
      • 4 Years Ago
      I hope they put a next-gen 6cyl boxer in the next Tribeca. The Tribeca is a good, if not somewhat anonymous, crossover. I'd like to see them pair that 6cyl with a CVT like Nissan does in the Murano. I'm driving a Murano now, and I've driven a first gen Tribeca. A 6cyl boxer with a CVT and Subaru's symmetrical AWD in a redesigned Tribeca would get me to trade in my Murano. Haven't heard anything about the Tribeca at all lately from Subaru, hope the silence means they're brewing up the next generation.
        • 4 Years Ago
        The Tribeca is likely deemed a "failure" by Subaru, much like the R-class. I wouldn't be surprise to see Subie kill it in favor of jump seats in the Outback.
      • 4 Years Ago
      Did't they already announce it...? Nothing new really.
      ... and still no news if Forester will get CVT for sure
      2.0L most likely not for U.S.
      • 4 Years Ago
      Quite thorough Boxer. What do you think will happen to the WRX? Will they give it a few better mpg or do they have any type of major performance increase plans to take them to a true next gen?
        • 4 Years Ago
        A lot of that depends on what this new engine is capable of, and if it will handle turbocharging.

        IF it does, and this new engine is capable of being turbocharged to a good effect, like the Hyundai 2.0 turbo 4 that makes 274hp, and returns good mileage figures.

        If the new engine isn't that well suited to turbocharging, and they keep soldiering the EJ engine on, maybe they'll try to add direct injection to that, or something... but more likely the WRX and WRX STI will become much more niche products with lower production, and less marketing emphasis.

        The Legacy GT is almost abandoned, and just sort of a test mule for the new front turbo layout, and new subframe engine cradle layout, which this new engine will likely share. That might point to the EJ in the current Legacy GT being kept on to serve the turbo-4 role, and adapted into the Impreza/Forester next iteration.

        Legacy GT probably won't survive much longer, based on Subaru's current attitude. Even Forester XT is in doubt, considering it's lack of manual or newer 5-speed automatic gearboxes, and it still using the old 4speed auto, and not getting WRX/LGT power levels.

        If WRX STI flounders in sales numbers, I could theoretically see Subaru consolidating WRX and WRX STI into one model, instead of two, with a price point, and equipment level somewhere between. The WRX and WRX STI already made the move for 2011 to look almost identical, apart from the wheels, both being widebody, with pretty much the same front and rear fascias.

        Especially with the absence from WRC or other premier organized motorsport series, and as mainstream customers gradually forget about Subaru's performance reputation, I think SOA at least, if not parent-company in Japan, will be focusing more on non-turbo H4-CVT economy models, and H6-hydra-matic up-level soft-roaders, like Outback. Legacy is along for the ride, because they can chop the outback down into a sedan, and it would be nuts not to have a mainstream appliance sedan of some sort.

        I think their marketing trend would have to significantly reverse direction to re-build Subaru's performance reputation, at this point. As it is currently going, WRX could theoretically end up being the last performance-oriented remnant and bone thrown to the enthusiast crowd, and if Legacy GT, and Forester XT sunset, the WRX would be the only remaining turbocharged Subaru model. Maybe that is why the Legacy GT has a re-fitted EJ turbo engine. It may go into that last remaining turbo Subaru, as all others use the new H4 and the current EZ H6 engines, that are both newer designs, and related to each other.
      • 4 Years Ago
      Bring us the boxer DIESEL!
      • 4 Years Ago
      I wonder if they might be adding D.I. Either way, I'm glad to hear they're improving the tech. I hope better performance extends beyond the fuel mileage, though. The STI and the LGT need to step their game up.
      • 4 Years Ago
      Great news!

      Now where is the updated turbo version. I'm guessing the Toyobaru is gonna rock this mill in some form or another.

      When is the new transmission design coming??
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