I'll just post the P cars, as for the rest click the link below

http://www.topgear.com/content/timet...tcars/01/?text

#17 Porsche Carrera GT
#44 Porsche 911 GT1
#45 Porsche 914/6
#46 Porsche 959
#47 Porsche 968 Club Sport
#48 Porsche 911 2.7 RS
#49 Porsche 928 GTS
#50 Porsche 924 Carrera GT
#51 Porsche 356 Carrera
#52 Porsche Cayman S
#53 Porsche 964 RS
#55 Porsche 911 GT3 RS