• Jul 7, 2008
BMW may begin straying from its long held tradition of equipping its M models with rev-happy, naturally aspirated engines. According to a source speaking with Automotive News, the twin-turbocharged 4.4-liter V8 currently equipped on the new X6, could be stroked out to 4.8-liters and fitted on future Ms, including the new M5, due out in 2011. The twin-turbo'd 3.0-liter inline six found in the 335i, 535i and entry-level X6 proved that BMW has the chops to create highly efficient and eminently entertaining blown mills, and there's no doubt that significant tweaks to the turbocharged V8 could boost power levels over the stock mill's claimed 407 hp, to take take serious aim at Audi's 572 hp RS6.

[Source: Automotive News – Sub. Req.]


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  • 49 Comments
      • 6 Years Ago
      ugh and the M cars slowly lose its NA racing heritage. nothing beats the sound of a classic throaty and responsive NA with ITBs
        • 6 Years Ago
        NA is preferable

        but I don't think they really have a choice

        FI opens up the limits that NA engines have reached


        How about this: sell two M5 models; one with the NA V10, and the other with the twin turbo V8.

        M5 and M5 Turbo

      • 6 Years Ago
      The V10 was doomed even before it came out. The V10 was to associate with Formula 1 (and probably BMW's Formula 1 cars), but Formula 1 announced they would be going from V10s to V8s before the M5 even became available. This left the V10 as a one-off engine with little reason to remain a V10.
      • 6 Years Ago
      LS9 + Carbon Ceramic Brakes + V = Sad M5
      • 6 Years Ago
      Really? The twin-turbocharged 4.4-liter V8 could be stroked out to 4.8-liters ? Woau :) . It isn't a very good news for the competition.
      • 6 Years Ago
      The E46 M3 in me thinks this is a terrible idea but the 135i in me thinks this is a fantastic idea.

      Decisions...
      • 6 Years Ago
      BMW doesn't make a 4.8 turbo V8. It's a 4.4.
        • 6 Years Ago
        The articles states that "the twin-turbocharged 4.4-liter V8 currently equipped on the new X6, could be stroked out to 4.8-liters and fitted on future Ms."
      • 6 Years Ago
      I used to think the smaller but high revving BMW engine philosophy was the way to go, and i enjoyed the hell out of my E46 M3. However, i've been driving an AMG car for almost a year (E63) and i have to say that torque is a wonderful thing and for most of us in day to day driving it is more important than having all the horses living high on the tach. Plenty of shove anytime, any rev is really a treat and for all applications other than road racing i think a big torque V8 mill is the ultimate engine. just my opinion.
      • 6 Years Ago
      Didn't BMW's 1.5 turbo fours make upwards of 1000bhp in F1 back in the early eighties?

      Seems Bimmer knows turbo-charging.
        • 6 Years Ago
        ... Whaaaaaatttttttttttt???

        *Goes to Wikipedia*
        • 6 Years Ago
        Carlos, get yourself a Vishu 335i. You could easily beat the living daylights out of most M3 poseurs..
        • 6 Years Ago
        For anyone else who hadn't heard of the engine davido mentioned:

        http://video.google.com/videoplay?docid=6119291851686945330&q=bmw

        There's a video of it placed inside an M1... WOW. That is the most ridiculous 1.5L four banger ever. WOW. It sounds amazing, too.
        • 6 Years Ago
        buy a 335i
        Carlos
        • 6 Years Ago
        Yes they did, but they'd only last one qualifying round. I'm salivating at the idea of an I6TT in an M3...
      • 6 Years Ago
      High revving Naturally Aspirated engines have there merit as they involve the driver in the "Driving Experience" as the driver must work for it. If I may make an analogy, A high revving engine is to a low revving engine what a manual gearbox is to an automatic transmission.

      With regard to efficiency, a turbocharged engine is superior.

      Only 1/3 of the energy in the gasoline is converted into mechanical energy in a reciprocating (piston) engine.
      1/3 of the energy is transfered via heat into the cooling system and the other 1/3 is expelled out the exhaust as hot gas.

      A turbocharger allows the engine to recoup some of the heat energy lost out the exhaust by turning the turbo.

      Turbocharged reciprocating engines are even more efficient in aircraft as the turbocharger allows for not only greater thermal efficiency, but allows the engine to operate at a greater power than the rarefied air at altitude allows.
      • 6 Years Ago
      BMW knows turbos and revs.
      Turbos + revs = lots of power = Awesome M car
      Whether NA or Forced Induction, you can bet the next M cars will all be amazing cars
        • 6 Years Ago
        BMW has made two turbo gas engines in their entire history. It's a little early to declare they "know turbos". Audi became famous for turbos (like in the original Audi Quattro), but still does a lousy job with them, they don't have even the basic anti-lag systems (dual entry, twin-scroll or other variable geometry) that a mid-90s Toyota MR2 or Mazda RX-7 had.
      • 6 Years Ago
      This is a very sad day, that V10 was an award wining engine, and simply one of the best engines in the world, blame the Saudis.
        • 6 Years Ago
        why not the LS2LS7 conveniently left off displacement, 5 liters, which it uses to make as much power as an LS7. The LS7 takes 2 more liters to make 505. I wonder why GM made an LS9? If it wasn't for competition it probably would not exist.
        • 6 Years Ago
        Why is physical size relevant at all?

        The engine can be any size as long as it fits in the bay.
        • 6 Years Ago
        Rob. I'll trade displacement for physical engine size, weight and cost. If it takes more displacement (like the LS7) to make more power in less space and weight than BMW's OHC V10, then I'm all for it.

        I did forget the 745i turbo. The BMW MINI engine is a Peugeot engine, not a BMW engine. What is this 4.4 turbo you are talking about? I seem to have missed it completely.
        • 6 Years Ago
        @why not the LS2LS7?

        THe LS7 also doesn't make any real sense. Seeing as it's less powerfull, heavier and less economic as the 3.6 TT Flat 6 from Porsche.
        • 6 Years Ago
        @why not the LS2LS7?
        BMW has made two turbo gas engines in their entire history.
        All right... 2002 turbo, E23 745i, Mini 1.6 turbo, 3.0 I6 turbo, 4.4 V8 turbo.

        I count 5.

        @Mobius_1
        BMW's twin sequential turbos are quite brilliant idea, and implemented awesomely in the 1/3/535i/d models.

        Only the diesels have sequential turbos. The gassers have parallel turbos.
        • 6 Years Ago
        It's an award-winning engine that also makes less HP in more size (and weight and cost) than the LS7. The V10 never made any real sense.
      • 6 Years Ago
      Audi's RS6 is 580bhp (not 560 as noted in the article). I don't know about BMW going this route though. They are known for engines with excellent reving characteristics and high redlines. I remember a few years ago when Audis were turbocharged, Mercedes were Supercharged, and BMW was All Motor. Now nobody knows what is going on!!!!
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