Rob White has warned Renault's teams not to expect any great gains this season due to regulatory reasons.
Having powered Red Bull Racing to four success Championship doubles, many have been shocked by Renault's fall from grace at the beginning of this V6 era.
That shock turned to anger on Sunday when Sebastian Vettel retired from Red Bull's home race due to an engine issue.
It was the German's third DNF of this season and led team boss Christian Horner stating that the "reliability is unacceptable" and that the "performance is unacceptable."
White, Renault Sport's deputy technical managing director, agrees.
"Christian has been extremely clear in his expressions to...
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