With four days of running at Jerez already under their belts, the teams were able to change focus slightly and begin discovering the true potential of their 2015 machines over the four-day pre-season test at Barcelona.

But which teams have made a jump forward, and which are at risk of dropping down the order? We crunch the numbers to shed some light on whose preparations appear to be coming on strongest for the forthcoming season via Formula1.com – Latest News http://ift.tt/1JCceIo