Polyphony Digital has spent $60 million of Sony's money through the five years of the Gran Turismo 5 project. That's according to an on-the-spot calculation by series producer Kazunori Yamauchi.

In a recent interview with Autoweek, Yamauchi was somewhat defensive about the game's budget.

"There are other games that cost more," he said. "Considering the size and scale of the game, I think it's probably a fairly small amount."

Source: develop-online.net