On the look out for a TDV8 3.6 L320.

Want to swap on some taller off road tyres. What is the max dimensions that the L320 can take?

I see Johnsons rods advertise their lift rods for bigger tyres and I know there are computer override options instead of the rods.

But I'm not convinced lifting is truly the best approach for bigger tyres, as with all IFS and IRS setups the wheel needs to cycle the full suspension travel. So under full compression you will be loosing all the lift unless you are also limiting suspension compression, which also wouldn't be desirable.

I really like how these vehicles look stance wise, but don't know the tyre size they have.

Click image to enlarge

Click image to enlarge

LR did a couple of 19in rims that fit over the TDV8 Brembos. There are a couple of aftermarket 18s around that I think also fit over the Brembos.

If you went down the 18in route, I believe 265/65/18 fit in the arches just fine and give you about 31.5in /803mm overall diameter and a sidewall of a little under 7in / 173mm.

Standard sizes for the TDV8 were 275/40/20 which gives dia. 729mm and sidewall 109mm, or 255/50/19 which gives 737mm and 127mm.

I run 255/55/19 (and did on my TDV8) on the 19in LR rim and I get 762mm and 140mm.

The issue with running rods is that you physically alter the car for the entire time - it's too high for road use and you lose the ability to make use of access height (can be useful on side slopes to lower the centre of gravity slightly and improve stability, and obviously can be useful in car parks, etc.).

A better option is to use one of the splice-in systems e.g. XLifter (https://www.xlifter.com/product-features/ ), Easy LIft (https://www.easylift-eas.com/ ) (Note: I haven't used either nor do I have any connection with either). Using such a system means you can have total control over ride height and can just use the total lift on the rare occasions that it's absolutely necessary. So much more flexible.

Yes, the plug-in systems are more expensive but they are the better all-round answer compared to just using rods.

Take care if you are at maximum ride height because I believe there have been instances of the front half-shaft failing/coming out when on full lock and power applied. Driving around at the maximum physically possible ride height isn't a good idea and it should only used to clear an obstacle. 2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

If you're going to be using it for off road work, might be worth looking out for the rare locking rear diff. Not that I've ever missed having one, but I can think of a couple of times when one would have made progress easier and less damaging to the ground. But I've never been stuck because of a non-locking rear diff.

It is possible to retro-fit the locking rear diff. I think there's an ECU and bit of loom required in the boot and then programming the CCF so the car knows it's there.

This was done on a D3 but it's the same running gear, etc., so should be the same with the RRS if one wished to try it.

Ah, yes, here it is: https://www.disco3club.co.uk/gallery/album...itment.pdf 2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

Is there an easy way to spot the locking rear diff for the RRS? I know on the D3/4 for the UK market you had to spec it on its own, so unless you crawl under the vehicle to take a look, there is no way to know. And most sellers and listings have no idea.

Was it the same on the L320 or was it part of an options pack with easier to spot items?

Thanks for the headsup on fitting the e-diff. I know at one time this was thought not possible. Glad to see it can be done!

RRSTDV8 wrote:

LR did a couple of 19in rims that fit over the TDV8 Brembos. There are a couple of aftermarket 18s around that I think also fit over the Brembos.

If you went down the 18in route, I believe 265/65/18 fit in the arches just fine and give you about 31.5in /803mm overall diameter and a sidewall of a little under 7in / 173mm.

Standard sizes for the TDV8 were 275/40/20 which gives dia. 729mm and sidewall 109mm, or 255/50/19 which gives 737mm and 127mm.

I run 255/55/19 (and did on my TDV8) on the 19in LR rim and I get 762mm and 140mm.

The issue with running rods is that you physically alter the car for the entire time - it's too high for road use and you lose the ability to make use of access height (can be useful on side slopes to lower the centre of gravity slightly and improve stability, and obviously can be useful in car parks, etc.).

A better option is to use one of the splice-in systems e.g. XLifter (https://www.xlifter.com/product-features/ ), Easy LIft (https://www.easylift-eas.com/ ) (Note: I haven't used either nor do I have any connection with either). Using such a system means you can have total control over ride height and can just use the total lift on the rare occasions that it's absolutely necessary. So much more flexible.

Yes, the plug-in systems are more expensive but they are the better all-round answer compared to just using rods.

Take care if you are at maximum ride height because I believe there have been instances of the front half-shaft failing/coming out when on full lock and power applied. Driving around at the maximum physically possible ride height isn't a good idea and it should only used to clear an obstacle.

300bhp/ton wrote:

Is there an easy way to spot the locking rear diff for the RRS? I know on the D3/4 for the UK market you had to spec it on its own, so unless you crawl under the vehicle to take a look, there is no way to know. And most sellers and listings have no idea.

Was it the same on the L320 or was it part of an options pack with easier to spot items?

Thanks for the headsup on fitting the e-diff. I know at one time this was thought not possible. Glad to see it can be done!

Put the suspension in off road height and have a look through the left rear wheel arch using a torch. You can see the rear diff. The locking diff has a motor on the top.

The Factory HST had the rear locking diff as did the G4. I believe the non-factory HST (a dealer-fitted kit) did not have the rear locker.

The rear locker is a very rare thing in UK L320 RRSs so don't get too hung up on it.  2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

300bhp/ton wrote:

The only real appeal with the rods is the price as a short term solution. The plugin systems would be my first choice.

Will have a look at some tyre options in those sizes.

BTW - do you know how the 18" aftermarket rims fit over the brakes? Are they designed bigger or is it just offset allowing it?

18's that fit brembos are PD1881 and pretty expensive. HughN found some steel 18's that also fit but can't remember the make - maybe do a search on here. He may also be selling them if not already gone.

I think Hugh's were Tuffant but don't hold me to it. 2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed