The car looks like an amalgamation between a number of different cars. I know of no vehicle that has a roof scoop, sculpted sides, rectangular headlights and a flat hood. Best approximation is a fusion of the Ferrari F40, the Mercedes CLK GTR, and the Ford GT.
Forgot about the Diablo's GT model. That's certainly close enough to be the reference vehicle. The hood sides and nose don't match up too well. And the Diablo GT's roof scoop is centralized, rather than being on the right side. Possibly just personal modifications. Or the artist took some liberties.