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NEW WHEELS braking, the transmission shifts down to optimize the ratio for the speed at the time. Conversely, this intelligent gearbox will select shift points that maximize fuel economy when it detects that you are just cruising or driving conservatively. Running in 7th or 8th gear at low engine speeds enhances fuel economy and reduces operating noise. Unfortunately, the company’s novel Auto Start Stop function is unavailable on this vehicle. A litre of diesel fuel contains more potential energy than a litre of gasoline, so in effect, the Cayenne Diesel will travel significantly farther than the gasoline-powered V6 model on the same fuel load. However, I should note that the Cayenne Diesel is playing with a stacked deck in the range department as it benefits from a 100-litre fuel tank verses the 85-litre unit fitted to most Cayenne models. I imagine this is due to the fact that there are

to drive. The well-sorted 3.0-litre engine delivers the same 240 horsepower as the Q7, but benefits from 15 more ponies than the Touareg. The torque rating remains the same for all three at a healthy 406 lb-ft. Power is delivered to the ground by all four wheels, and runs to 100 km/h from a standstill take place in a respectable 7.2 seconds. Towing capacity is 7,716 pounds, which will permit you to tow a reasonably large boat or travel trailer to the cottage with ease. Porsche’s phenomenal eight-speed, Tiptronic S transmission is the sole offering for the Cayenne Diesel, but this ultra-smooth gearbox is efficient, quiet, and quick to react when you employ the gearshift controls on the steering wheel. The Cayenne Diesel is no slouch, and the Tiptronic S transmission automatically adapts the shift points for performance driving. Under heavy

FEB / MAR 2013

Trucks Plus 29

Trucks Plus Feb-Mar 2013  

Trucks Plus February-March 2013 Issue