Home News Gran Turismo 5 GT5 Time Trial demo is only 219Mb News by Patrick Garratt Founder & Publisher (Former) Published on Dec. 15, 2009 Follow Gran Turismo 5 The GT Academy 2010 time trial demo releasing this week costs a piffly 219Mb to download. We know because we're doing it now. The purpose of the tester's is to find winners for next year's GT Academy. It hits publicly on December 17. We'll do a movie for you in a sec.