It's the Fiat 8V (Otto Vu) with a body by Vignale. A very rare car. Because of its looks and to distinguish it from other Fiat 8Vs with design by Vignale, it's called Demon Rouge. I don't know the exact number, but I remember they built less than ten of these.
EDIT: found a good website on the fiat 8V range just now.
http://www.ritzsite.net/Fiat_8V/03_Fiat8V.htm
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