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2013 Porsche Cayenne Diesel Trumps Hybrid Model With 19/29-MPG Rating

2269 Views 3 Replies 3 Participants Last post by  grohgreg

Stuck deciding between a Porsche Cayenne diesel model the hybrid? The decision just got a lot tougher (or easier) now that the EPA has released its fuel economy ratings for the diesel SUV.

Rated at 19-mpg in the city and 29-mpg on the highway, the Cayenne diesel actually bests the Cayenne S hybrid in terms of highway fuel efficiency. The S hybrid nets a 24-mpg, while it is 1-mpg better in the city than its diesel counterpart. Now throw in the fact that the hybrid model is a significant $14,100 more than the diesel model and maybe your decision just got a whole lot easier.

Of course, the diesel model is powered by a 3.0-liter V6 with 240-hp and 407 lb-ft of torque. Compare that to the Cayenne S hybrid that has a total system output of 380-hp and 427 lb-ft of torque, and the hybrid is undoubtedly more fun to drive.

Either way, the fuel efficiency figures for the Cayenne diesel is certainly impressive, 29-mpg on the highway for a sporty SUV is definitely a plus.

2013 Porsche Cayenne Diesel Trumps Hybrid Model With 19/29-MPG Rating | AutoGuide.com News
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And that 29mpg will only get better over time. I had pretty much the same engine in my 2011 Touareg, which was EPA rated at 28 highway. That number increased regularly with use. By the time I traded it (@17,000 miles) it was up to 33 mpg. The engine in my Cayenne is one generation newer, as is the transmission. So I fully expect even better economy out of the Porsche. I'm told that this constant mpg improvement goes on until approx 35k miles, at which time the engine is nicely broken in.
35k miles is a lot of miles to put on before seeing significantly better MPG. Is it like that with diesels?
Perhaps you should re-read my post. I said it should getting better with time. Meaning that the 33 mpg I saw at 17k miles (on the Touareg TDI) wasn't the whole story. I fully expected it to continue getting better before leveling off around 35k miles. I fully expect the Cayenne to do even better. To reinforce the point, the car before the Touareg was a 2006 Mercedes E320 CDI. I traded it at about 50k, at which time it was returning up to an impressive 39.6 mpg
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