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Originally Posted by MitchZ06
He explained why too  It was a heat issue from the cars being so trimmed out that there wasn't enough downforce to warm the tires and the cool conditions at night exacerbated the problem. |
The problem was a bit more subtile.
The main problem was with the medium tyre compound. During the day it was quite cool (compared to Spa and Imola where Peugeot was dominant), so they could not get temperature into the tyre (because of less aero and less torque than in the previous years). When they went of the racing line, the tyres cooled down which is why Audi was much better in traffic.
During the night they could use the soft tyre compound, which did not suffer from the said heat issues. That is when the Peugeot showed superior performance over Audi, who stuck to the medium compound.
Davidson also said that Peugeot was better in the wet. Remember that in those conditions Lotterer had to weave his car to get the necessary heat into his tyres.