Porsche Cayenne to receive a 4.2-liter V8 TDI diesel engine

Article by Christian Andrei, on February 20, 2012

The much-awaited performance diesel for the Porsche Cayenne has arrived, according to an insider. Back when the first generation of the SUV had come out, many said that the company will launch a performance diesel that would make up for the fact that this oil-burner has a Porsche badge. But no such diesel engine arrived.

In fact, all that the second generation of the Cayenne got was a 3.0-liter V6 TDI unit that produces 240 hp and a peak torque of 550 Nm (405 lb-ft). The Porsche insider said that the Cayenne will be powered by the 4.2-liter V8 TDI oil burner from the VW Group. This is slated to make its appearance by the end of 2012 but the exact specs of the engine haven’t been announced yet.

That’s because Audi got this engine from the Q7 with the latest facelift. As Porsche has recently revealed the 313 hp BiTDI V6 unit, it would be expected to be seen on Cayenne’s bonnet.

However, the diesel V8 is still found under the Touareg’s bonnet, where it boasts an output of 340 hp and a peak torque of 590 lb-ft (800 Nm). It’s expected that when used on the Porsche unit, the figures will be much higher.

The new Cayenne further defines the attributes that the Porsche brand has been known for – sporty, lightweight, elegant, sophisticated and dynamic. With the addition of the Porsche Cayenne S Hybrid into the range, the new generation of the Cayenne family dictates the mood in terms of fuel efficiency. In fact, the Cayenne models consume up to 23 percent less fuel than their respective predecessors.

This is because carmaker developed the new Cayenne in accordance with principles of Porsche Intelligent Performance that centers on getting more power on less fuel, thus achieving greater efficiency while lowering carbon dioxide emissions.

Upon closer inspection of the five models in the Cayenne range, three of them are below the fuel consumption limit of 10 liters per 100 kilometers as per New European Driving Cycle. In addition, the Cayenne Diesel and the Cayenne S Hybrid emits 195 grams and 193 grams of carbon dioxide per kilometer, respectively. This means that their carbon dioxide emissions figures are also below the limit of 200 g/km.

There are quite a number of factors that made it possible for all the new models in the Cayenne range to consume less fuel than their predecessors. First is the fact that they employ an intelligent lightweight construction as well as Porsche's new eight-speed Tiptronic S automatic transmission that features Auto Start Stop and a wider range of gear increments.

Moreover, these Cayenne models feature variable overrun cut-off and recuperation of the on-board network as well as thermal management on the engine and transmission cooling circuit. Interestingly, all the new Cayenne models are lighter than their predecessors thanks to a weight-optimized mix of materials and concept changes (like a new extra-light all-wheel drive).

Case in point, the new Porsche Cayenne Turbo is around 185 kg (almost 410 lbs) lighter than its predecessor despite enhanced product substance and improved levels of safety. This allows the new Porsche Cayenne Turbo to perform better and be easier to handle and more agile while consuming less fuel and emitting lower carbon dioxide emissions.

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