Actually I believe the m12 is only one with a Lamborghini motor. The w8 has a aluminum block bi-turbo v8.
The w8 does 0-60 in the low fours, I think it is 4.2 secs.
The top speed was never verified. Weigert would throw out numbers like 240 mph, but that is commonly believed to be BS due to poor aerodynamics.
More likely it is closer to 180 mph. Above that and the front end starts to lift and the car could flip like a race boat!
A couple years into production they started putting ground effects on it to stablize it. I don't know what effect this really had.
$98,500 is not bad actually. Most go for around $100k. It is rare to see them for sale except for this pre-production model that Weigert has been trying to sell for over a year. The cheapest one sold for $60k in a used car lot in Japan. I saw a picture of that. I couldn't believe it. I don't think they knew what they had. Somebody got a helluva deal.
I don't think his is in the best shape of the ones out there. I don't know for sure, but I would check for all the parts.
Parts would be a big concern if I bought one. I hear the customer service ain't that great. And getting someone who has the knowledge to work on this exotic would be very expensive.
If I were rich, I would buy one anyway and drive it into the ground. Which probably wouldn't take that long as they are notoriously unreliable.