Read: 2011 Nissan Navara Review
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Nissan has today released details of an improved diesel engine for the new top-of-the-range Series 4 Nissan Navara ST-X Dual Cab utility. Powered by a 140kW/450Nm 2.5-litre turbo-diesel engine (up from 126kW and 403Nm of torque), the Navara also sports a list of interior and exterior enhancements and is available in two new colours, Electric Blue and Flame Red.

Nissan says the additional power and torque is a result of fine tuning by Nissan's R&D team which has also brought down emissions to 224g/km (down 40g/km) and the fuel usage to 8.5-litre of diesel per 100km (6-speed manual), a reduction of 1.3-litres over the previous model.

If you're after an automatic the 5-speed gearbox will also deliver an improved fuel economy figure of 9L/100km, down from 10.5L/100km.

Getting a little more into the technical side of things, Nissan has changed the direct injection system, which now operates at 2000 bar (as oppose to 1800 bar). According to the Japanese company the increase in pressure results in the fuel spray being atomised to an even finer degree, hence a more complete combustion.

With class-leading diesel power and torque, improved fuel economy, lower emissions, more safety equipment, better quality and a refreshed visual appeal, thenew Navara is well-positioned to attract even more customers to its ranks,” says Dan Thompson, CEO of Nissan Australia.

Other new engine parts include a new cylinder head with parallel ports and a new variable nozzle turbo (VNT) with electric control (as oppose to a hydraulic system used in the previous 2.5-litre engine).

Despite all the changes to the diesel, if you're after a petrol variant, the 198 kW V6 4.0-litre petrol engine already on sale in the ST-X will continue unchanged.

Engines aside, from the outside the new-look ST-X Dual Cab gets a new bonnet, revised grille and a new more rounded and sporty bumper assembly. This results in 80mm overall increase in length. The top-of-the-range Navara will now ride on new six-spoke 17-inch alloy wheels.

Nissan says although the changes are aesthetically pleasing, they are also purposeful with a reduction in the coefficient of drag (Cd) from 0.38 to 0.37, which helps with fuel economy and cabin refinement.

Sitting inside the facelifted Navara you will quickly notice new switchgear (all-wheel drive command control), revised door trims, new seat fabric as well as chrome highlights and revised dials.

Some logical enhancements have also been made with the door pockets now able to hold a typical large-scale map book and a one-litre drink bottle.

Completely new features for the ST-X include dual zone climate control plus power folding mirrors, Bluetooth hands free phone connectivity, auxiliary input for MP3 devices and a trip computer.

Passive safety is taken care of with driver and front passenger airbags, side airbags and curtain airbags while active safety is under control thanks to Electronic Stability Program being fitted as standard on ST-X diesel models.

Some notable features of the Navara ST-X that Nissan believes will set it apart from the competition are:

  • height-adjustable headlight control,
  • folding electrically-adjustable mirrors,
  • 6 speaker audio system
  • three-point rear seatbelts for all seats,
  • switch operated AWD mode selection,
  • 4-channel Utili-track load restraint system,
  • 60/40 split folding rear seats
  • dual zone climate control.
  • active head restraints are another critical safety feature fitted to the new Navara ST-X.

Pricing for Nissan Nivara ST-X petrol manual and Auto, and ST-X diesel manual and auto.

  • Nissan Navara ST-X Petrol 6-speed Manual - $47,990
  • Nissan Navara ST-X Petrol 5-speed Auto - $50,240
  • Nissan Navara ST-X Diesel Manual - $50,990
  • Nissan Navara ST-X Diesel Auto - $53,240