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.