Volkswagen I.D. R (but please, do something about these names!!), 7m57.148s.
It's interesting that they ended up with something that closely resembles an LM Prototype car. I imagine they had complete freedom to design something that was aerodynamically efficient for something with a cockpit and 4 wheels.
"Only" 670hp and 479ft-lbs but very useful in a 1100kg car with no power penalty due to altitude. It's only going to get faster from here.