McLaren racing director Eric Boullier believes driveability and fuel management will be more significant than raw pace.
Lewis Hamilton returned Mercedes to the top of the times during the final pre-season Formula 1 test of 2014 in Bahrain.
Valtteri Bottas led the way on the final morning of 2014 Formula 1 pre-season testing, while Sebastian Vettel suffered an off just before lunch.
Sergio Perez again set the pace for Force India, as the second day of the final pre-season Formula 1 test got underway in Bahrain.
Lewis Hamilton has dismissed the perception that the 2014 Formula 1 regulations will prove more suited to Nico Rosberg.
Nico Rosberg set the fastest time of the week in Formula 1 testing in Bahrain, as reigning champion Red Bull suffered again.
Mercedes led the way for the second consecutive day in Formula 1 testing in Bahrain, as Nico Rosberg set the fastest time of the week.
Nico Rosberg topped the morning running of day four of Formula 1 testing at Bahrain, setting the fastest time of the week so far.
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