Here is my updated EV/PHEV specs/dimensions chart. I've used the picture in the Model X Tesla page to get relative size of X using known height of S.

Will the EPA range for the S and X really be as low as you're estimating? I was under the impression that the 85-kWh S, though heavier, would have a longer range than the 56-kWh Roadster... Also, the torque (and perhaps HP) for the X with AWD goes up by 1.5x, not 2x...

Yeah, the S ranges are estimated way too low. While the roadster range of 245 does not correlate to the 73 epa range of the leaf, it certainly isn't 30% less.

The Leaf gets 70% range because Nissan Uses a L4A cycle that has a median speed of ~20 mph, while Tesla uses 55mph test cycle. Look at the Tesla Roadster forums for real world range.

No - Leaf has 100 miles in combined EPA cycle - before applying the 30% adjustment. See EPA FOIA documents posted in MNL. BTW, the Model X reveal apparently had mixed driving numbers for S - 128, 180 & 244. So, close to 20% adjustment.

Sorry we are butting heads today but the leaf has 73 miles per charge per EPA. It gets 99MPGe 201112 Electric Vehicles

I see the full picture now. Tesla's numbers are not EPA tests but their own number of 'ideal miles' which is 55mph cruising, probably with a small amount of reserve power. EPA tests until the car is dead.

If Tom Sax's number of 85 miles is correct for the Leaf as equivalent to how the Roadster is measured, then the percentage to subtract would be about 14% (0.86x), so the Roadster would have about 210. (Which I think is about the value used in the UK). That might be a bit different for the Model S, but in case a similar number would be used, it would be about 260 miles. (There was also talk the range might be slightly more than 300 miles by its current measurement: @55mph). That would be much more than the 210 in the table above.

I wish I knew what the Model X ground clearance number they were aiming for. Does anyone know this from the reveal, a sales rep, or other source?

Any futher details on that ? The language of mixed driving etc makes me feel this is the range Tesla expects to get from EPA. For eg. I'd expect to get nearly 73 miles in Leaf at highway speeds.

Whatever the EPA says the range is, I hope Tesla advertises something closer to what most of their customers will get or qualify it with the @55 mph statement. Providing a link to a webpage with that mileage estimator they had at the event would be great. Be as transparent as possible when it comes to range, something a traditional manufacturer doesn't have to do as filling up at a gas station takes care of any range issues.

Energy Efficiency of Tesla Electric Vehicles | Tesla Motors I looked at this graph, and some derived from that graph, my driving habits and the EPA numbers on my car. I am expecting 112/168/210 ranges with their batteries. That is Highway at 80mph, AC, and a few 0-40mph at stop lights. I expect I could stretch the mileage to the Tesla numbers fairly easily. Driving 50-60 on the interstate, gentle starting, and as much regen as I can manage. I basically took Tesla's numbers and multiplied by .7. It helped that the Leaf's real world vs. their stated range was roughly this ratio also.