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<b>UNTAPPED POWER:</b> Daniel Ricciardo tests Red Bull's camouflaged racer during 2015 F1 testing at the Jerez circuit in Spain. Renault says it has yet to tap the true potential of its 'power unit'. <i>Image: AP / Miguel Morenatti</i>
LONDON, England - Renault has confirmed reports that it did not hit full throttle during pre-season Formula 1 test at Jerez in southern Spain.
Under its skin is a heavily-upgraded Renault 'power unit', the result of a sweeping restructuring at the automaker and the hefty exchange of so-called unfreeze performance 'tokens'.
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