420 miles on a tankful is not unusual in my experience. MY2016 HSE D SDV6 - gone due to fuel dilution problems.

By the age of 50 you have the face you deserve - George Orwell.

Seems realistic.
I am always between 450 and 520 with my hybrid, the previous regular SDV6 was between 370 and 420.

I get 600 miles from a tank? M16 SVD8 ,4.4 HSE with a few extras, Sold R50 , Wife SQ5 , BMW R1200GSW.

But you have a 100ltr tank whereas the SDv6 with AdBlu has an 80 or 85 ltr tank IIRC. 2020 Pangea Green 1st Edition D240 New Defender 110 is here and loving it
2018 Melting Silver Mini Countryman PHEV - soon to be replaced
2015MY Corris Grey SDv6 HSE Dynamic, the best car I have ever owned, totally reliable only a cou0le of rattles in 3 years, now no longer in my care
Also in my garage is a 1996 TDi300 Defender 90 County HT made into a fake CSW

Yes, my refill is never more than 70 liters.

Thanks all for your responses

Also should I change the silver Range Rover lettering to black or black with chrome edging, thoughts please ?

Gloss or Matte black, the chrome edged lettering might look a bit naff with all the other black on the car, same at the back and you could replace the dark green LR oval with a black one with silver text too 2020 Pangea Green 1st Edition D240 New Defender 110 is here and loving it
2018 Melting Silver Mini Countryman PHEV - soon to be replaced
2015MY Corris Grey SDv6 HSE Dynamic, the best car I have ever owned, totally reliable only a cou0le of rattles in 3 years, now no longer in my care
Also in my garage is a 1996 TDi300 Defender 90 County HT made into a fake CSW

Thanks, I've already changed oval badges front and back to black ones

Will go with gloss black Range Rover lettering

Who best to do this?

You can get them from LR dealership accessory and parts departments or go to forum sponsor DCC4x4 or there is another very popular website who make some excellent instructional videos for adding/ changing bits of all LR models - PowerfulUK - who also sell different coloured lettering sets 2020 Pangea Green 1st Edition D240 New Defender 110 is here and loving it
2018 Melting Silver Mini Countryman PHEV - soon to be replaced
2015MY Corris Grey SDv6 HSE Dynamic, the best car I have ever owned, totally reliable only a cou0le of rattles in 3 years, now no longer in my care
Also in my garage is a 1996 TDi300 Defender 90 County HT made into a fake CSW

SDV6 around 380 miles on a tank mixed driving.

On this basis my SDV8 is getting better fuel economy than the SVD6 which I don't think is quite right. M16 SVD8 ,4.4 HSE with a few extras, Sold R50 , Wife SQ5 , BMW R1200GSW.

In metric my SDv6 gets between 6 and 7ltr/100km 2020 Pangea Green 1st Edition D240 New Defender 110 is here and loving it
2018 Melting Silver Mini Countryman PHEV - soon to be replaced
2015MY Corris Grey SDv6 HSE Dynamic, the best car I have ever owned, totally reliable only a cou0le of rattles in 3 years, now no longer in my care
Also in my garage is a 1996 TDi300 Defender 90 County HT made into a fake CSW

So Tim this means yours would get over 600 miles on a tank based on these figures. 600 miles is close to 1000 k's and 80/7 goes 11.4 times so better than 600 Miles. M16 SVD8 ,4.4 HSE with a few extras, Sold R50 , Wife SQ5 , BMW R1200GSW.

Bails, don't forget we are restricted to a measly 100 or 110kph in this country. Uk most motorway driving is anything form 110 to 150 kph. Also don't believe what you see on the dash. I did an airport trip last night filled up at the beginning and was surprised to see 5.8l/100 on the dash. I then filled up on return and worked out that it was actually 7.4l/100! Still good for large car. SDV8 arrived and fantastic even the infotainment!
1983 2 door Range Rover ARB Bar X9000 winch ARB Rear Bar now semi retired.
Many big trips done in this one.
1982 Rangerover nearly restored.
22 Defender D250 with lots of stuff for outback touring
Nice 2013 Freelander TD4 manual (for daughter to learn on) with much better stereo compared with previous SD4 SE with Meridian which sounded bad!
2013 Land Rover Defender ute.