Gran Turismo 5 is a big game, so here is a big list of every single car contained within. There is a heavy focus on Japanese manufacturers (Polyphony does love their Skylines), but there's sure to be something for everyone.
This list is pulled straight from Eurogamer, and a "P" stands for a premium car (which has enhanced damage modeling and an exquisitely detailed cockpit view) while "S" is for standard, which are basically HD versions of the cars from Gran Turismo 4 and don't have the extra fanciness of the premium models. There's still damage, but it's not as... disfiguring.
See your favorite? Feel free to sound off in the comments. Oh, and it's worth noting that every car here is on the disc, no DLC required! So without further ado... it's mega list time @ Eurogamer