Nissan Australia has launched a fresh attack on the 4x4 utility and SUV markets as part of its GT2012 product plan to be the number-one vehicle importer in Australia, with the latest new models coming as range-topping 550 variants for the Pathfinder SUV and Navara utility, thanks to a powerful new V6 turbo-diesel engine., The Pathfinder Ti 550 and Navara ST-X 550 models bring class-leading performance to the Nissan stable with a Renault-sourced 3.0-litre ‘V9X’ engine that produces 170kW of power at 3750rpm and 550Nm of torque from just 1750rpm – figures that are unmatched in the medium SUV wagon and 4x4 ute categories. , , Does it transform the two 4WD vehicles? GoAuto takes a first drive to find out.