When the official source of a rumor calls it a rumor, the grain of salt grows proportionately. But according to the crew at BMWBlog, the recently teased BMW X6 M550d will come packing 381 horsepower and a pavement ripping 545 pound-feet of torque.

The news comes courtesy of unnamed sources that say the first diesel from the M division will supposedly pack a tri-turbo, six-cylinder diesel nestled beneath a modified hood. Two versions are rumored to be available: a traditional RWD variant badged the M550D and an all-wheel-drive version that appends the xDrive moniker to the end. BMWBlog's people on the inside say that the RWD model will hit 60 mph in 4.9 seconds, with the AWD doing the deed in 4.7 ticks.

The good news: The M-fettled diesel X6 will reportedly go on sale in March of 2012. The bad news: It's a Euro-only affair.

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    • 1 Second Ago
      Bruce Lee
      • 3 Years Ago
      I'm excited but also scared at the prospect of a tri-turbo BMW motor that's going to need a near-perfect high pressure fuel pump...
      • 3 Years Ago
      I'd be disappointed if this motor didn't find its way into a more attractive Bimmer. Like the 3 or 5. That gem of a motor deserves to be in something that isn't a travesty of a design.
      • 3 Years Ago
      All the torque in the world doesn't mean much when you have a 2,000rpm wide powerband. I just don't see how these kinds of numbers are possible. I am sure it'll be a monster on top gear acceleration, but 0-60 has never been the fortay of a diesel.
        • 3 Years Ago
        Guess you missed the part where 0-60 sprints in the four second range are reported. Fast acting automatic transmissions pair well with diesels.
      • 3 Years Ago
      Those power numbers don't seam enough to get those 0-60 times. The x5d is 265/425 and gets 0-60 in 6.9. I don't see how adding 120hp and 120ft lbs will shave off 2 full seconds. Maybe they gear it down very low and the tri-turbo helps broaden the power band.
        • 3 Years Ago
        I thought the same thing. The 335d is like 1200lbs lighter and still barely breaks 6.0 0-60, People have them chipped and aren't hitting sub 5's. Either way,if it does actually hit those numbers and get 27mpg it will be a nice option for a full size, sporty SUV that will be easy on the fuel wallet.
      • 3 Years Ago
      An uber-stupid ride for the triple collar polo weenie set.
        Evan McMiller
        • 3 Years Ago
        Wow you are bitter. Mad because your Malibu is in the shop again? Jeezus.
      • 3 Years Ago
      I'm not sure if it's Euro only to be honest. BMW Australia has been teasing the car... so there's a likelihood that it may also be headed this way (although apparently the X6 doesn't sell particularly well here). Considering the popularity of diesel cars in Europe it makes sense the M would eventually do a diesel car.
      • 3 Years Ago
      Shuaizhi Tian
      • 3 Years Ago
      diesel engine's high efficiency that gasline can not match, from f30 diesel edition 800miles range, how could those gasline turbo match this? even the new star n20b20. but the torque that also powerful, the future way of m could be diesel way. we can see that hybridx6 already stop to make, the hybrid isn't the brilliant dawn
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