hmmmm fascinating ..... but ...... the rovers not the only one :S i ve seen prados, land cruisers (army /police kind) do this stuff.......even SJ 410 .......... and well the willy's perhaps do even more. However, yes i ve never seen a jeep go under water n come out :S thats amazing if it actually came out of it on its own...........:S
But most jeeps will tolerate water above it tires. My poor 5 door prado takes it on a 2L turbo........ i ve done it loads of times........but yes water level was always below the hood........... never above that (dint try n dont plan to n i dint have the air filter/intake box on the roof but i did have a rubber pipe from the silencer to the roof....:S