As trivial as it might seem - I'm honestly going to be pretty adamant that GT5 have vastly improved engine sounds. The American cars seemed to sound particularly like a dying hair dryer, but they need to improve all around for this next generation to really be worthwhile.
As their name implies, Polyphonic Digital tends to manufacture their own sounds, but the very least they could do is start off with a real recording and manipulate it similar to Simbin's GTR FIA Racing Game or Rfactor.
If they can't get at least somewhat closer to this, then they don't need to bother trying:
http://www.gtr-game.com/download/Pit_Comms_in_game_sketch2.mp3
http://www.gtr-game.com/download/Pit_Comms_in_game_sketch.mp3
http://www.gtr-game.com/download/550_clip.mp3
Anyone still think the current engine sounds are realistic?
As their name implies, Polyphonic Digital tends to manufacture their own sounds, but the very least they could do is start off with a real recording and manipulate it similar to Simbin's GTR FIA Racing Game or Rfactor.
If they can't get at least somewhat closer to this, then they don't need to bother trying:
http://www.gtr-game.com/download/Pit_Comms_in_game_sketch2.mp3
http://www.gtr-game.com/download/Pit_Comms_in_game_sketch.mp3
http://www.gtr-game.com/download/550_clip.mp3
Anyone still think the current engine sounds are realistic?