Range Rover Sport GVM Upgrade Question

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Originally Posted by haydent

found this thread about armoured too DISCO3.CO.UK - View topic - armoured version - suspension details??

interesting details about differing parts & reduced travel shocks, and that limit being programmed into the ecu, i guess to not raise anymore, or too high....

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Hi Hayden

Did you end up going anywhere with this? Sorry, I didn't see you'd made these posts earlier in the year.

Very interesting from the UK website. It is my belief that the air spring bag itself is in fact the identical for the armoured variant - what changes is the damper unit, and the UK website makes mention of a volume displacer for the armoured variant which increases the spring rate (by reducing the remaining working volume in the bag). The pressure stated in the D4 workshop manual is a working pressure of 5 to 8 Bar for the rear springs - I would be willing to bet that if you put a pressure gauge on the lines and loaded the rear axle up to 2350kg that you would get 8 Bar pressure, which you can then point to the Discovery 4 manual as being within its design specs.

Myself I've used my Range Rover Sport now for a few good long tows with our caravan which it has been great for but we're right on the rear axle limit. I'm on the fence whether to spend some money on getting the GVM upgrade as I really like the car for towing or whether to keep dancing around the limits and balancing weights.

It just seemed a bit too much work, cost and unknowns, and then to have a modified vehicle which might have unknown complications for insurance and resale.

And i think it was going to be hard if not impossible to find an engineer that would take it on.

I did call one that was keen on the 5 seat to 7 seat re-rate of the rrs L494 if i could show no difference in parts.

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So we just added the collection and bought a 2010 2.7 D4 [bigrolf]

Can overtake while towing up hill like the v8 can, but we just granny it around instead and save diesel as a bonus.