Mine has the 255/55/20 Pirelli tires, I noticed on the IP it shows recommended pressures of 44psi front and 51 psi rear. The ride has been very harsh on rougher road sections.
Looked at the online owners manual and they state 34 front and 37 rear for up to 4 passengers and the higher pressure only for heavy loading.

May have to bump it down to improve the ride.

What are others running their tire pressure at for normal day to day driving?

Edit:
When looking at the IP there is a light load option with the same lower pressures. I lowered the front to 36 and the rear to 39 and will see how the ride feels, it felt pretty harsh on rougher pavement at 46/51 (which I had previously).

 

I run 44 front and 50 rear with the factory Goodyear 20 inchers, and recently installed Blizzaks at the same 44/50.
It doesn't seem rough to me.

 

Mine has little chance of ever going "off road". In this are a if that happens it means you are a poor driver and missed a turn. ;-) I run my tires at 36 front and 40 rear. It helped the ride a bit. The Disco rides as well or better than any other vehicle in it's class,,,,I have driven plenty of others before I bought this.

 

After going down to 36 front and 39 rear the ride is definitely much better. In our neighborhood the roads can have a lot of small cracks, bumps, etc and the lower pressure definitely makes the ride much better. Even felt better and smoother on the freeway. I will up the pressure when loading it though.

At least the IP is set for light load and recognized it this morning when I turned it on, so no warnings.

 

Interesting you can run them so much lower pressure than suggested. I'd have thought that at 10psi below that would impact fuel economy and also premature tire wear

I run mine 44 front and 50 rear and it feels fine over the rough and potholes roads of MA

 

Actually in the owners manual and even the IP it states 2 tire pressure settings.
Normal load for up to full GVWR
44 Front and 50 Rear

Light Load for up to 4 occupants
34 Front and 37 Rear

Not sure if the link to the online manual will work
Land Rover Owner Information

Since the D5 will mostly be driven with up to 4 occupants (maybe a few more with small children) the light load setting seems to be the way to go for most of the time with ours. Just need to remember to air up for longer trips with heavier loads. Apart from a better ride, I have not seen any difference in anything else. I prefer to run a few PSI over recommended to prevent under pressure as tires loose air over time. Besides 36/39 PSI is pretty darn high at any rate.

Just an option to consider for more comfort if the ride feels a but harsh on uneven pavement.

 

I run my 22" on light load at 33 front and 37 rear. Nice smooth ride and still handles great.

 

It's interesting that 'light load' of up to 4 pax is probably normal for most people. The difference in psi is very substantial. As mine seems to ride fine at the 44/50 pressures I'll stick with that for the fuel efficiency benefits. And we are often 6-7 pax
But good to know there is quite some leeway in what is needed...

 

I had mine at 44/50 and it was too harsh for me. At 33/37 it feels good and I am getting 19-21mpg which I can live with.

 

I noticed an interesting this morning, the recommended pressure on the IP starts out at the cold pressure settings (light load) of 34/37 when I started driving this morning. However after 30 miles on the freeway the recommended pressure went up to 37/40. This is pretty good as it compensates for tires warming up with driving and then showing the actual pressure as well.

I think I'm going to go to 36/38 cold pressure , so a tiny bot over the recommended pressure.

I don't think there will be a huge difference in MPG between high 30s and 40s/50.