Porsche is adding the Performance Start function to the 2015 Cayenne diesel (as well as the 2015 Cayenne S and Cayenne Turbo) as part of the optional Sport Chrono package.
Although Performance Start isn't a full-bore launch-control system like the one used to slingshot PDK-equipped 911s, Boxsters, and Caymans toward the horizon, it does allow the driver to launch the Cayenne from rest at wide-open throttle after side-stepping the brake pedal. Porsche claims that Performance Start shaves 0.1 second from the Cayenne's zero-to-60 time. And as if being a compression-ignition Porsche SUV weren't oddball enough, the gadget also means that model joins the very, very small roster of production diesel vehicles with similar technology. (Our long-term BMW 328d wagon has launch control, for example.)
Here's how it works: The driver pushes the Sport Plus button on the center console. With the Cayenne stopped and the eight-speed automatic in drive, the driver presses the brake pedal and floors the accelerator pedal. A dash telltale indicates that Performance Start has been initiated. Within two seconds, the driver side-steps the brake pedal and with the accelerator still matted, the Cayenne launches in what Porsche describes as the "most efficient manner possible." This includes extraquick 1-2 and 2-3 upshifts, occurring at the optimal engine speed to leverage the powerplant's peak power and torque.
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No muss and no fuss, and the compression-ignition Cayenne pulls a wicked holeshot. At Porsche, it seems even the frugal get to have some fun.
from Car and Driver Blog http://ift.tt/nSHy27
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