1. Williams FW35
Of all the teams that finished outside the top 3 last season, Williams perhaps has the most reason to feel confident about 2013. Williams' 8th place finish in 2012 didn't reflect it's competitiveness through-out the season. In Pastor Maldonado, Williams has an incredibly talented lead driver, and a man who won a Grand Prix last season. If last year's criticism of the car was over-complexity, that has certainly been addressed for this season, with a simplified front wing and sidepods designed to create extra downforce.
Link: Williams F1