It will match the 3.2 second 0 to 60 mph time of the McLaren F1, one of the fastest cars ever made. And it will be even more efficient than the current, already terrific, Model S.

"This car is nuts. It's like taking off from a carrier deck. It's just bananas," said CEO Elon Musk, who unveiled the D at a crowded event, next door to the headquarters of the other company he helms, Space X.

And for those who settle for the standard Model S over the new Model S P85D, there's something new: The cars now being produced are stuffed with high-tech safety technologies that will allow the car to automatically avoid danger and even drive itself—kind of.

The Model S P85D shares an exterior with the Model S sedan, and Musk didn't mention any changes to the interior. What is different is what's under the skin: A new motor between the front wheels to go along with the one in back.