1/2" of that clearance is purely from the increased tire size on the Discovery 5...it comes stock with 31s vs 30" on the LR3/4. So with equal tire sizes we are talking a 1.1" difference only. It would be interesting to know how large a tire could realistally fit the D5. We know 32s easily fit on a LR3/4 with 18" rims which gets it within 0.6" of the D5. It would be good to understand how much larger the D5 can go....which we know will be limited by it's larger brake discs that force the 19" rims
The weight savings is nice but there is something to be said with 1000 extra pounds when you're behind the wheel...gives me a warm safe feel that I'll destroy nearly anything I hit and keep me safe and sound
Of all the D5 attributes, the weight savings are by far (imho) the biggest improvement. Colin Chapman knew a thing or two when it comes to performance of any kind - light is right. About the only time lighter isn't better is when pushing maximum towing capacity where long wheelbase and road crushing weight can be an advantage for stability.
As a for-instance, last weekend I was out wheeling in the snow. This is an area where the massive weight of an LR3 is a huge disadvantage: it's a simple formula of tire size vs weight to keep you 'floating' on top instead of sinking until you're high-centered. Mind you, I'm not talking about a foot or two of snow where you might hope to 'dig down' to a solid surface with your tall and skinny pizza cutters, but actual deep snow that's effectively bottomless. Stay on top or stop moving. I run 275-70-18s (33") on my LR3 which is about as big as anybody (OK, I know at least Lucky8 is running 35s but I don't know the details) and the huge weight of my armored rig means sinking easily. For comparison, my buddie's RRC on 35s could quite literally drive around me...and pretty much every other Jeep/Toyota/Rover on the trail. Again - floatation vs weight. The same is true of mud - you either float or don't.
I have no illusions that a modern vehicle like the D5 will ever be what an RRC was/is. I'm holding onto some vague hope that the next Defender might fill that role. I was initially very disappointed in the styling of the new D5, but the reviews and stats are starting to win me over. However at this point there are still a few things that come up as huge show stoppers for me.
The bodystyle looks like it won't lend itself to easy mods. Bumpers, sliders, tire carrier, winch, etc. I like to play in the rocks and without those things you WILL damage the body.
It does not look like you can run much tire. Of course I haven't seen one in person to check on this but again, more tire = more better in almost every off-road situation. I'm guessing it won't be long before there's a Johnson Rod-ish lift for it, but the wheel wells look very tight. Likely this is for a combination of styling purposes and aero improvements.
19" wheels standard and the inability to run anything smaller. 19" is just an odd-ball size. Even 20" seems to offer more options...not that I'm advocating for this. In today's world 17" seems to be the ideal mix for tire vs wheel sizing. 18" is workable. 19" is the odd-man out with few companies even offering a tire in this size. 20" can work if you're running a really large tire like 37"+ where you can still get some sidewall size. I know a tall sidewall isn't going to do well for sales to the highway folks, but it would be nice to at least be able to fit a smaller wheel for those of us who will take it off-road.
I'd also put all the frilly tech into this category in that it adds unneeded/unwanted weight, cost, and complexity but it's not a deal-breaker for me the same way the items above are.
I'm slowly warming to the platform but it will take some time. I'm going to stand back a bit and wait for the aftermarket to show me what they can do with this platform. I'm not likely a new-car buyer anyway, so perhaps they'll make headway on these issues by the time I'm ready to ditch my LR3.