Three times during the last few years I have had the task of dewatering diesel Land Rover 90/110s which have taken in water, each time following flash-floods after exceptionally heavy rains. In each case, thankfully, no harm was done - just a lot of effort in stripping down air cleaners, air intakes and intercooler pipes and turbos. Removing heater plugs to expel water in the combustion chambers, by jacking up a front wheel, with vehicle in gear and rotating that wheel by hand to clear the water out of the cylinders. This is followed carefully by short bursts from the starter motor.
Since you end up with the said vehicle each time in deep water - excuse the pun - you then have to check and change as necessary any oils that may have taken in water.

On each occasion, all that showed after were very wet seat swabs which took days to dry out.

I don't wish this learning curve upon anyone. You have been warned.

Carburettor Range Rovers don't have such a problem, as their intakes are high above the V8. Mind you, a simple shield made out of aluminium, fitted to the front of the intake, will save water being thrown in by the fan. Efi models have their intake trumpets facing down below the headlamps. Bad news, so keep out of very deep water. That's a must.

Discovery V8s are much the same as above. Tdi models route the air intake through a void between the inner and outer wings. If you are into serious stuff, fit an external high intake for peace of mind.

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(c)Goodwinch Limited 2006