[Nonfractal]

I thought the Megane [...] would be the one grabbing points.

Nonfractal, your Megane was faster on the straights than the winning Mercedes, however it lost ground on the  compound curve (top right of the track layout drawing). That curve is configured R4>R4>R3>R3>R2>R2. The Megane took the first part of the curve at Mercedes speed but then, as it entered the R2 section, it simply rolled gently onto its side. So I had to slow down. 
Your car is a few mm taller than the NSR and has a fractionally shorter guidebase which may explain the effect.

Thanks for that feedback. 
Nice to know she's still quick. 
I raised the motor up higher to handle Andy's drop from the Devil's dyke (which killed the Megane at the winter rally) and that will explain the roll DeSlot behaviour.
The car is also carrying light kit left over from the rally. 
The improvements are a new body (no light kit) and an offset pod to get the motor to the dead right height. 
The car will then go off down-under to take on the Aussies later this year.

For this road race, only bad weather will save the day. Bring on the ice! 
Alan