Porsche Introduces Cayenne Diesel

By Paul Riegler on 3 April 2012
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Porsche will soon become the fifth carmaker in the U.S. to offer a diesel model with the introduction of the Cayenne Diesel sport utility vehicle (SUV).  Currently, diesel models are available from Audi, BMW, Mercedes-Benz, and Volkswagen in the U.S. market.

The Cayenne Diesel was first offered in Europe in 2009 and will be available in the U.S. this September as a 2013 model.

It is powered by a 3.0-liter V-6 turbo diesel that developers 240 hp and 406 pound-feet of torque.  It can go from 0-60 in 7.2 seconds and has a top speed of 135 mph.

Although final EPA fuel economy figures are not yet available, Porsche estimates that the Cayenne Diesel will have a rating of 20 mpg (10.2 l/100 km) in the city and 28 mpg (8.4 l/100 km) highway.  Based on this, the Cayenne Diesel can go up to 740 miles (1191 km) on one tank of fuel.

The Porsche Cayenne Diesel meets Tier 2 Bin 5 emission standards and uses a selective catalytic reduction system that incorporates AdBlue (urea) fluid to reduce Nox emissions.

The 3.0-liter V-6 diesel engine uses high-pressure common rail fuel injection and a variable vane geometry turbocharger.  The engine block itself is constructed from compacted graphite iron, which reduces overall mass by 55 pounds (25 kilograms).

The new Porsche comes standard with an 8-speed Tiptronic S transmission although it does not employ the Auto Start/Stop functionality found on other Cayenne models.  Also included is Porsche’s Traction Management system, which features permanent all-wheel drive.

To ensure that the driver only uses diesel fuel, there is a mechanical safeguard in the fuel tank filler neck that ensures that only the larger diameter diesel fuel pump nozzle can be used for refueling.

List price of the Cayenne Diesel starts at $55,750 plus a $975 destination charge.

In addition to the diesel- and gasoline-powered Cayenne, Porsche also offers a hybrid model with a supercharged 3.0-liter V-6 gasoline engine paired with an electric motor powered by a 288-volt nickel-metal-hydride battery pack.