The actual capacity,many the usable capacity will certainly be different, and to be fair to JLR they do refer to usable capacity in there specifications, they have though changed from all V8 having 105 litre tanks in the UK (petrol / diesel) to just the V8 petrol now having 105 litre, and all UK diesels now having ad-blue,,and the lower 89 usable litre tank.

Seems some other market still have 105 litre tank, not sure if they have ad blue or now (which is circa 20 litres).