The reason I would consider the petrol 'underpowered' is that the V6 lacks the bottom end of the crd. But of course it does as that is the crd's forte. The problem I have is that it is also lacking compared to the TJ I traded in for it. (I would have bought a crd, but couldn't afford that.
)
The practical upshot is, that in the TJ, I could start off uphill from low revs with no problem, but if I want to start slowly uphill in the JK I need to rev it & slip the clutch. Hence it
seems underpowered, but it is really just a lack of low end torque compared to the crd to TJ inline 6. Having said that, it also uses less juice than the i6 in my TJ used.
I would
love to have the spare cash to fit a supercharger, but if I had had that when I got the JK, I would have just bought the crd instead.