Measuring lift. You need to define what you want to know.
Eg
From the ground to the axles
From the ground to the chassis
From the axles to the chassis
From the chassis to the body
From the axles to the body
From the ground to the body
Or the wheel arch gap
The reason for this is. There are many different ways to lift a Vehcile.
And it all depends on what your question is and why you want to know
Also there is a huge variance even with standard Land Rovers depending on the year, engine and body configuration.
The poster above recommended measuring from the stops. If you crawl under the chassis. There should be a rubber block mounted to the underside above the axle on each chassis rail. 4 in total. If you measure from the bottom of these to the tops of axle tubes it will give you a datum point.
You’ll need to be on perfectly flat ground. As any sort of slope or uneven ground will make all of the gaps different as the suspension slightly flexes.
Other issues are. Bump stops are sometimes missing. And they might not all be the same size. Some pattern ones might be shorter or taller. Mounting tabs can get bent. So may not be a perfectly reliable point to measure from and there are longer after market bump stops too.
