Not even halfway through the 2014 season, Renault is having to acknowledge it will not catch up with V6 pacesetters Mercedes.
That, according to the French marque's F1 engine chief Rob White, is because of the FIA's homologation rules, more commonly known in the paddock as the development 'freeze'.
Renault is under huge pressure from disgruntled partner Red Bull to up its game, but White said: "The possibility to change the specification of the engine during the season is extremely limited.
"We are pushing for next year," he is quoted by Italy's Autosprint, "in order to have a greater scope of development.
"At the moment it is not possible to change the...
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