The c5 allroad is a very capable offroad machine, matter of fact early models with the optional low range gearbox were the only car based SUV that passed the Land Rover offroad official test ! That movie was the reason why i kept my W reg allroad for over 5 years, apart from routine maintenance, top end rebuild (was worn to start with due to Longlife servicing and i got it very cheap at the time !) and a injector pump refresh it never gave me any issues !
They stopped selling the low range gearbox when they facelifted the allroad in 2001, last one i had with a LR box was a Y reg 2.7TT, i had plans to swap it to my other diesel however it would have meant a lot of work to swap bits and bobs from one to the other ! Ended up selling it to a C**T that still owes me money and now it does not answer his phone or calls back !
I agree the movie was ok till it started taking off and surfing the water however the footage in the grand canyon was all legit and it did me proud at the time !