Auto industry insiders report the 2004 Infiniti QX56 is based on the Nissan Pathfinder Armada. The Infiniti QX56 includes the same Nissan Armada 5.6-liter DOHC V-8 engine with a 5 speed automatic transmission. However, engine compression is bumped from 9.8:1 to 10.0:1, boosting power output to 315 horsepower and 390 pound-feet of torque. The QX56 is also available in 2WD and 4WD versions.
The Infinity QX56 retains a good portion of the Nissan Armada bodywork, except for the wheel-arch moldings and the area from the A-pillar forward. The simple waterfall grille, large Xenon headlamps, and bulbous fascia help refine the design. Another singular characteristic is a split roof rack, rated to carry 200 pounds.