[ZombiePhysicist]

Go to the 7:47 marker and check out that Citroen. I dont know much about the Citroen's suspension but it seems like the mclaren magic hydraulic cross linked suspension is similar... but, check out time marker 8:58, the old Citreon bests a mclaren 675!

 

[Bridster]

The 1999 Xantia test was almost certainly not set up according to the norm. They tried to replicate the result with 3 different cars - with more grippy modern tires even - and the best they could do was 73km/h:

In any case, the Moose test has questionable validity to begin with and suspension is not necessarily the most important factor to navigating it at high speed.