The 14 day trial of PS Plus is as if you were actually a PS Plus member. I'm pretty sure they said you get access to everything, so you'll get to test out Drive Club.
Edit - Yup here is a full article. They have a good deal right now. Buy one year of plus get 90 days extra
Today at Sony's Gamescom 2013 press conference, the company announced that all Playstation 4 owners will receive a free 14-day Playstation Plus trial with the purchase of their console.
Sony also confirmed that the free Playstation Plus trial will give gamers access toDriveclub and the new-announced Resogun.
Additionally, Sony announced that Playstation Plus members would receive free access to Assassin's Creed III in the month of September.
Finally, if you purchase a year of Playstation Plus, you now get an additional 90 days (25%) for free. The standard price for a year of PS+ is $50
