Could be worth the time to compute this, but would only be theoretical. I find that I can hammer on my s p100d for maybe 1-3 minutes before the battery starts to overheat and power is cut. When I am in that mode I am easily burning 3 miles or more of charge for every mile driven.
I wish they had a better way to keep that better cold! I noticed with the p100d that at high speeds and big battery usage the regenerative braking shuts off, so perhaps an attempt to keep the battery more cool by not pushing electrons back in.
As it stands though, if you are out on a track with this thing, you will get beat by the likes of the ford focus and dodge dart, so a high performance sedan it is not (only for short distances and at least in usual driving situations the car is unbeatable by nearly anything you will ever encounter on the road).