The rumours surrounding troubled engine supplier Renault continue to swirl.
The French marque had a nightmare race weekend in Austria, beginning with paddock rumours of a split with Red Bull, worsened by yet another failure for Sebastian Vettel, and ending with a stinging rebuke by Christian Horner.
"Seven cars in the top ten have a Mercedes engine. That says it all," said Horner.
Germany's Auto Motor und Sport cited sources estimating the horse power deficit at between 40 and 70bhp.
And with the mandatory engine development 'freeze', there is little Renault can do short of arguing to the FIA that the rules should be relaxed so that Mercedes' rivals have a chance.
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