Not so long ago, our Michael Harley drove the Porsche Cayenne Diesel up in flannel-lovin' Alaska, and he returned home safely from that expedition pretty well convinced that Porsche knows how to create a really heavy, mountain-topping 4x4. In fact, since the test for the first generation of the Cayenne Diesel back in 2008, it's been clear: The diesel version of the Spice Islands Porsche is among its very best.
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