The Hemi is a fine engine, but it most definitely is not leaps, and bounds above the Nissan 5.6. On paper it makes more power, but in the real world you are splitting hairs.
That Armada also makes it's peak torque of 385 ft lbs @ 3400 RPM. The latest Hemi 5.7 is rated at 410 ft lbs, but needs 3850 RPM. I will say the HEMI is definitely more responsive than the Nissan V8 now that it is mated to the 8 speed. The 5, and 6 speed units were very close to the Nissan 5.6.
The old Nissan 5.6 was proven to be faster than the new GM 5.3 towing, and empty by TFL truck as well.
The 6.2 from GM is a monster though.
Glad to hear y'all were happy with the deal.
I never said the HEMI was leaps and bounds better than the Nissan 5.6L? I said...
"Not a huge powerhouse like a HEMI or the new GM motors but it is no slouch and it has a lot of low end grunt which is perfect for towing his trailer and boat. Would run away from and tow circles around the Expedition."
I will stand behind those comments. I have driven a Titan with the 5.6L( and a Titan is much lighter than an Armada )and the 5.6L while a good motor is not in the HEMI's or new GFM 6.2L's Class power wise. That is not a put down or insult it is just fact.
For towing the 5.6L Nissan is just fine as it has a lot of torque available at low RPM's. A lot like the 5.4L Ford did. There is more to it than towing though. In normal use the Nissan 5.6L, like the Ford 5.4L, falls behind the more powerful HEMI and GM offerings. That is my experience with the motors. Doesn't mean it is inadequate for the vehicle or anything either. It has all the power the guy needs.