Some more info / science !
Mk 7 ,8 ,9 wheelbase is 10 ft , xk120 (& 140 ,150) is 8 ft 6 in , 1.5 ft shorter ! ,noticeably different
( Also XK track is 6in narrower than mk 7 )
I think pictures from similar angles of a standard mk7/8/9 & the Worblaufen car illustrate the wheelbase difference quite well.
Also if you scale up from a 16in wheel (where tyre bead sits) on Worblaufen car & calculate wheelbase you end up much closer to that of xk........
Interesting to compare the Beutler xk 120 & mk7 ,the latter is barge-like in comparison to their xk !