My 21 JLUW has the 3.6 eTorque engine. I like it. After having owned a 2018 JGC with a 3.6 ESS, I wanted the 2.0T. However, after discovering the 2.0T uses direct injection exclusively, I opted for the port injected 3.6 eTorque.
Honestly, it drives just like my 2018 JGC. The little electric motor doesn't provide any top end boost to HP or torque. It does however make the stop-start feature almost seamless and much less intrusive. So much so that I just leave it on versus disengaging the feature practically every time I started the Grand Cherokee.
My only concern at this point is longevity of the BSG, associated control circuit, cooling hardware, and lithium battery. Those are the great unknowns in terms of reliability although the RAM 1500 guys have had the eTorque Pentastar V6 for several years now. Reports of engine problems seem to be minimal.
I’ve had my ‘21 3.6 with eTorque for about 800 miles and like it infinitely more than my ‘18 3.6 with ESS. It’s much smoother, and doesn’t have a terrible, crappy aux battery that will die every six months.
I had the 3.6 in my 2013 JKU and the 3.6 in my 2021 with eTorque I am liking better so far. Just feels more refined. My ‘13 was manual though. The start stop is very smooth. My wife who has start/stop in her Mini even stated that she didn’t notice the start/stop as a passenger at all. The 8 speed auto is a dream so far with this engine.
2021 with 3.6 and e-torque. Initially I didn’t want the e-torque with the 3.6 but now that I have it, I love it. Like others have said, it drastically improves the start/stop feature. It’s extremely smooth and I like that it doesn’t use the starter for ESS like the non e-torque variants.