Post by
MinisterofDOOM »
https://forums.nicoclub.com/ministerofdoom-u16506.html
Wed Dec 28, 2011 9:38 pm
While the VQ40 (4.0 V6) is definitely a very reliable and dependable motor, I don't think the VK56 (5.6 V8) is any less so. The old 4.5 liter VK from Infiniti's cars had a handful of issues, but the modern 5.6 liter truck motor is stout and dependable.
The biggest irritation faced by us Nissan folks when making this decision is that the VQ40 makes less power and torque but doesn't offer improved fuel economy versus the VK56. So there's really no reason to go with the V6 unless you're really afraid that the 8 will be unreliable--which I wouldn't be concerned about. EPA fuel economy ratings are within 1MPG for either. I'd definitely go with the VK56 if I were buying an NV (or even just a Pathfinder).
The NV is closely related to the Titan, and the V8 powertrain is straight out of the pickup, so it's had several years of production to work out the kinks. Meanwhile the VQ40 is the mainstay Frontier/Pathfinder/Xterra engine, so it's got years of honing under its belt as well.
Also:
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