I don't understand the sense of this car at all. Having smaller engine this car still weights as a small camper. So what is advantage of buying V8 between W12? I can find here only one advantage - V8 looks a bit better. So this car would buy only people, who haven't enough money to buy W12.
It would be great to throw off the weight below 2 tons, using aluminum and carbon fiber. Then it would become more expensive, but maybe 500 PS V8 wouldn't be faster than the W12 in a drag race, but it would surely be faster on the corners, and then it would be logically to buy less weight V8 than W12.