BlackWorksInc
New member
It would be interesting to see how well the tailgate opens/closes on a new JGC when compared to a 4Runner when placed in a similarly-flexed position. I'm optimistic that the modern JGC would perform much better in this regard when compared against an old XJ, whose design dates back to the mid 1980s.
I can't comment on newer Japanese vehicles but my E90 BMW felt like it was carved out of a solid block of steel. They aren't known for body issues. This being said I do know BMW has screwed up before - the older E46 M3 is notorious for broken rear subframe mounts.
The issue is also long term resilience to those forces, the flex a vehicle exhibits in say a turn is not as drastic as a vehicle that's on two wheels and has the weight of the vehicle pulling one end down while the suspension is trying to compress and extend at oposite corners twisting the body. That's a lot more flex in the body than most vehicles are expected to see. Like I said before, it may not be an issue in the short term, but after a while you'll probably see evidence of fatigue in the unibody and suspension, that's what seems to happen to unibodies being off-roaded heavily. I know the older JGC from the mid 80's to mid 2000's or so have those issues as I've seen and had a couple friends who wheeled them hard.
Keep in mind the BMW is more designed for on road manners and forces than heavy offroading like you'd do in a 4Runner. It's very solid feeling because it's a porker and the adaptive suspension coupled with bracing lends it to hug the road really well.