Caterham F1 Team
Caterham driver Kamui Kobayashi has conceded that Renault powered teams are currently unable to compete with rivals Mercedes and Ferrari.
Renault has endured a troubled start to 2014 when problems at the first test in Spain restricting the running of Red Bull, Toro Rosso and Caterham.
Kobayashi completed 66 laps and was the fastest of the Renault powered cars, albeit some 4.9s off of the pace set by Kevin Magnussen on the second day of the second test in Bahrain.
"This is what we have in our hand right now so we have to help them to be able to fight with the other engine manufacturers," Kobayashi told Autosport.
"At the moment, we are definitely too weak...
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