Hey Discoveries are really pretty bad *** 4x4 right out of the box.
With a little tweaking they are super. Especially the series I Disco's.
Series II had a longer tail..
The only downside to a Disco is it's exit angle, I banged my Disco's butt a lot. But I could follow around modded Wranglers all day long, not to mention yank them out. I even freed up some big ole 4x4 Blazers and a Dodge Ram..
There hill decent gearing is phenomenal. The Disco like a Wrangler will go a lot of places that a Hummer 1 won't go. I.e. narrow spots..

Disco & Rover were based on the same platform, and both had just about equal off road performance.
These vehicles are awesome off road, but the older ones especially the Series I and Series II discoveries are awful on road.. Poor steering (like driving a rudder), bad gas mileage, and no get up and go. And they leak oil!