Spark Plugs or Glow Plugs

When Americans think of diesel-powered vehicles, the first thing that likely comes to mind are heavy-duty pickups. It’s quite unfortunate that we’ve been trained to think this way. However, thanks to the latest influx of small-displacement diesel-powered cars and SUVs, we’re slowly starting to see the light, and we have Europe to thank for it. Now, before you go sending angry letters, we’ll address what’s likely question number one. Yes, the American-made Jeep Grand Cherokee is offered with the 3.0L EcoDiesel. And yes, it is fantastic! However, we already looked at that engine as installed in the Ram 1500. So in an effort to not repeat ourselves, we slid behind the wheel of the BMW X5, which is offered with a 3.0L inline six-cylinder in both gasoline and diesel configurations.



Audi Glow Plugs


Luxury Accommodations

Interestingly enough, when researching diesel-powered SUVs available for purchase in the U.S., most are available from luxury brands. Audi offers up the Q5 and Q7, Mercedes drops an oil-burner in the GLK and ML, Porsche fit a 3.0L V-6 in the Cayenne, Volkswagen gets it done with the Touareg, BMW brings to the table a diesel offering in both the X3 and X5, and lastly, the Grand Cherokee EcoDiesel will give any of these a decent run for their money. What are missing from the list are the entry-level and compact-size SUVs. Jeep had a go of it for a short bit when they offered a 2.8L inline-four diesel in the Liberty, but that experiment was ultimately short lived. Unfortunately, this means getting into a diesel SUV is going to require one to open their wallet just a bit wider than normal.



audi Q7


The Power Difference

Back in the BMW, we chose the X5 platform for our test largely because of its similar engine options. The X5 is available with a 3.0L inline-six engine for both the 35i and 35d. However, don’t be confused, as aside from obvious, these two engines are completely different animals. The 35i comes equipped with a turbocharged gasoline direct injection engine that cranks out 300 hp and 300 lb-ft of torque.