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You know our answer. While gasoline certainly holds a special place in our hearts, it's difficult to deny the efficiency and power available from diesel fuel. XCAR recently added to their impressive list of videos by putting two Audi A6 models to the test: one with the company's stalwart supercharged 3.0-liter V6 under the hood and another powered by the company's twin-turbocharged 3.0-liter diesel V6. Our host finds plenty to love in both engines, and while the video ultimately concedes that most performance-minded buyers will still wind up with the gasoline mill in their personal vehicle, the clip makes a good case for the diesel's potent thrust and superb fuel economy.

Of course, that's in an imaginary world where all engines and fuels share similar costs. Here in the US, it's a bit harder to justify the steep entry fee for a diesel engine. Throw in how expensive diesel fuel can be, and the argument becomes even more tenuous. Still, those issues don't dampen our enthusiasm for the beautifully shot video below. Check it out.



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    • 1 Second Ago
  • 37 Comments
      Cody
      • 1 Year Ago
      Diesel.. More torque
      Mike
      • 1 Year Ago
      If you're driving an audi, the you're paying for premium gas anyway, so the gas price is not that much different. And the video really didn't answer the question of how it sounds, you only get to hear the exhaust for a split second. For audi's Q line, it seems like a no brainer considering the torque.
      mitytitywhitey
      • 1 Year Ago
      Wish we could get that biturbo diesel in the US. The 240hp single-turbo isn't bad though.
      • 1 Year Ago
      [blocked]
      Hazdaz
      • 1 Year Ago
      Ugh. What an annoying ass "review". Stop trying to copy Clarkson - you can only wish you had his talent - and get your hipster self to come up with your own unique on-camera persona. This one ain't working. Beyond the annoying reviewer, this video was even more worthless in that it simply showed that *GOSH* a diesel will be more economical than the gasoline engine - DUH! No head-to-head drag racing or even a lap around a track. Little talk about actual driving fun. Not even a break down on ownership cost where the extra cost of the diesel is factored in with the better fuel economy to see which car is better in the long term.
        Kronos
        • 1 Year Ago
        @Hazdaz
        >>>the extra cost of the diesel is factored in Diesel is about the same price as regular unleaded in the UK. And less than the premium gas required by the 3.0T. Same in Canada, btw.
        Vinuuz
        • 1 Year Ago
        @Hazdaz
        Dude, the review is in the UK - Diesel is cheaper than Gas in Europe. But yeah, some of the more obvious stuff was not done at all.
      chrismcfreely
      • 1 Year Ago
      Diesel does not cost more than regular unleaded everywhere. It does not cost more than premium in a lot of places. Why does AB act like in all 50 states diesel costs like 50 cents more than regular unleaded?
        Judah Richardson
        • 1 Year Ago
        @chrismcfreely
        Diesel costs way more than gas in every state I've lived in (TX, FL, KS, IL)
          • 1 Year Ago
          @Judah Richardson
          [blocked]
        Luc K
        • 1 Year Ago
        @chrismcfreely
        Because it's now summer which is the low for diesel demand. Just wait until winter and see how diesel prices will climb quickly and in some states will be more expensive than premium.
      FIDTRO
      • 1 Year Ago
      You can't really go wrong with either in an A6, but I'd take the diesel.
      knightrider_6
      • 1 Year Ago
      " it's difficult to deny the efficiency and power available from diesel fuel." Dear Autoblog, please get your physics straight Power =/= Torque and yes, the gasoline engine has more power and better acceleration.
      erzhik
      • 1 Year Ago
      In Europe? Diesel In US? Gas In cold climate areas? Gas
      jdedelman
      • 1 Year Ago
      Sorry boys and girls, I just bought a 2013 A6 2.0T Quattro, and it only gives up a few mpg to the diesel that costs nearly $10k more. I'm sure many will disagree, but I don't really need to scoot to 60 mph any faster than 6.3 sec.
        Matt
        • 1 Year Ago
        @jdedelman
        3.0 TDI has like twice the torque at ~2k RPM as the 2.0T. No one needs that extra torque in a luxury car, but it sure puts a smile on your face when you step on the accelerator.
          graphikzking
          • 1 Year Ago
          @Matt
          Torque puts a smile on my friends face in his 2005 ish Passat TDI but then the Prius puts a smile on my face as I pass him and I don't have black smoke pouring out of the exhaust. (This is 100% true the 2010 prius is faster than his automatic Passat TDI). Both engines have their place but diesels huge benefits are the torque. Well why would someone want torque? - to TOW things. So if you aren't towing anything or it's not a pickup truck then the torque is mostly wasted. I'd much rather have a cheaper, nearly as efficient with regular fuel thus breaking even on gas costs than paying more for the car, having a slower car and having to search diesel stations out. Really think that VW needs to just bring a small pickup with this engine. It would be great. Put the 140hp, the 240hp and call it a day! I'd buy one within the next 12 months if it was priced accordingly (compete with the old defunct Ranger).
          Fred Talmadge
          • 1 Year Ago
          @Matt
          Unless you like to rev the engine, which I do, then gas is the way to go. Also diesel is about 10 cents more a gallon than premium here in Houston
          montoym
          • 1 Year Ago
          @Matt
          I take it back, the '05 Passat did indeed have the 2.0L TDI. Though still an older version than we have available now. In any case, they are still slightly quicker than a Prius (though it's like racing snails). Both are rated at pretty close to 10sec 0-60. Not surprising since both have the same equivalent HP. The gas and electric combined power in the Prius is 134hp, same as the HP rating of the '05 2.0L TDI in the Passat.
        StaceyS
        • 1 Year Ago
        @jdedelman
        Not that it matters: The 3.0l diesel isn't available in North America today. You were probably comparing your purchase to the 3.0l gas engine that is available now in the US.
      JJ
      • 1 Year Ago
      Petrol all they way. Only diesel I like are the big i6 and v8s in SUVs and truck with tons torque.
      thedriveatfive
      • 1 Year Ago
      The diesel sounds like a winner until you realize the car always is going into regen and getting error warnings from pluged exhaust gas particulate filters...
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