The Nissan Murano, Nissan's mid-size crossover SUV, returns for 2010 with no engine changes, following a 2009 redesign. The Murano's only engine is a 3.5-liter DOHC V6. This 24-valve, all-aluminum engine, known as the VQ35DE, is a version of the award-winning V6 used in the Altima and Maxima sedans. It features micro-finished camshaft and crankshaft journals for reduced internal friction; a resin-cast intake manifold with a Variable Intake System (VIS) to optimize engine breathing at all engine speeds; Nissan Direct Ignition System; and continuously variable timing for the intake valves.
Last year's engine revisions increased the Murano's output to 265 horsepower and 248 lb-ft of torque, up from 245 horsepower and 246 lb-ft in earlier years. The Murano's engine is less powerful than the version of the VQ35DE used in the 2010 Maxima, which has 290 horsepower and 261 lb-ft of torque. The engine in the Murano has been tuned for stronger mid-range power, to compensate for the crossover's greater weight.
The Murano's 265-horsepower V6 is more powerful than the rival Honda Pilot, but falls short of the 273-horsepower Mazda CX-9 and the 288-horsepower GMC Acadia. Nevertheless, the Murano's performance is among the best in its class, thanks in part to the Xtronic continuously variable transmission, which keeps the engine in the meatiest part of its powerband for swift acceleration and passing.
The 3.5-liter engine's muscle does not come at the expense of good manners. Reviewers say it is always smooth, and engine noise is unobtrusive. It is also one of the most fuel-efficient engines in this class. EPA estimated fuel economy is 18/23 for both FWD and AWD Muranos, better than the Acadia or Pilot, and much better than the thirsty AWD CX-9, which rates only 15/21. However, Nissan recommends premium fuel, while key rivals use cheaper regular gas.
Author: Ronnie Tanner.
Ronnie Tanner is a contributing writer at http://www.swengines.com & He writes about selecting used engines and choosing this as an alternative to costly car purchases.
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