Lowe Roche and Pfaff Auto have created a virtual race for a real 2013 Audi A4. 

Users can join the Pfaff Twitter Race by signing in with their Twitter account. The first ten contestants to gain 2,500 new Twitter followers will each win a key, only one of the keys will unlock the new Audi A4 – that person will win. The contest is supported by ads, pictured, that are running in newspapers and appear in-store at the auto dealer and on their website.