For 2012 the Porsche Cayenne will feature a new diesel engine.
The three litre V6 retains the same bore and displacement but now delivers 245 hp (180 kW), 5 hp (3.7 kW) more than before, while consuming only 7.2 litres of diesel per 100 km (39 mpg imp.). At the same time, CO2 emissions have dropped six grams to 189 g/km.
Naturally, the greater power has a knock-on effect on performance as well. For example, the acceleration time from 0 to 100 km/h (62 mph) has been cut to 7.6 seconds (minus 0.2 seconds) with top speed up two to 220 km/h (137 mph).
The improvements have been achieved through a package of measures, from the use of new materials to reduce weight, lower frictional resistance to a revamp of the injection system, along with a new turbocharger and enhanced thermal management. In detail, the crankshaft for example has been redesigned; fewer counterweights and hollow bores make it lighter and thus more free-revving than before.
Direct injection pressure increased by 200 to a maximum of 2000 bar, with a direct impact on the quality of mixture formation.
The variable geometry turbocharger is also a new design with optimised bearings and a new compressor wheel, which translates into improved response and greater efficiency. The package of measures also sliced 20 kilograms off the weight of the V6 engine, cutting the unladen weight of the Cayenne Diesel to 2080 kilograms.