From one of the guys on DISCO4, who times his Touareg and D4 0-100km/h times (using the iOS app Rev), found the Touareg quoted times was optimistic, whereas the D4 times were pessimistic (he got sub 9 seconds).
Perhaps LR didn't want quoted times for the D4 to be too close to that of the RRS.
Perhaps it's a case of giving it a go and see...

