sentences:  Initial pre-season testing was very positive, with many speculating that BMW could surprise some of the top teams with their performances when the season got underway.The rear wing is mounted by the endplates, rather than the pylon-mounted arrangement used by some rivals' cars (such as the McLaren MP4-22).The engine's name, P86/7, is indicative of the fact that it is not a new engine, since it is heavily based on the P86 used in the 2006 F1.06 car.