No it's concept version used the Mercedes AMG model S65 V12 engine. Confusing. The final production version used the s85 from the M5/M6. I didn't see the episode, but I don't know where they got 4 liter or 470hp. It should be either 5 or 6 liter, depending on the car they were using.
http://en.wikipedia.org/wiki/Veritas_(automobile)