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Overall Efficiency vs. Other Electric Cars

One thing that really impressed me about the Model S is the overall efficiency. Yes, the model S is a very fast large luxury car with a long range but does not use up much more energy than a Nissan Leaf. I'm also impressed how much progress Tesla has made in the last four years. The Model S is much more efficient per pound than the Roadster.

I created this comparison table.

http://teslaowner.wordpress.com/2012/12/15/efficiency-comparisons/

I have to admit, I didn't even look at the Ford Focus Electric or the Mitsubishi Electric. These low end range vehicles have a place but I'm not particularly interested in them myself.

I have seen very little discussion on this topic. I think going forward overall efficiency is relevant for both costs of electricity and the way electricity is produced. I have more than enough solar panels to support both my home usage and one electric car.

I don't think Tesla can keep pace with something like Moore's law as there is not a correlation. I'm wondering where future improvements in efficiency can come from.

Future improvement for the 60KWh version could easily come from not carying in dead weight the equivalent of 25 KWh of batteries. Has it been confirmed that the 2 versions tilt the scale at 4647 lbs?

we have seen estimates of 100 lbs to 300lbs for the additional cells in the 85kWh. no confirmation though

Did you compute another ratio:

KwH/100miles/lb.*1000

Roadster = 11.15
Leaf = 10.04
Model S 65 = 7.53
Model S 85 = 8.17
Coda = 12.53

So the Coda is the worst one, and the Model S 65 is the most efficient one to move 1 lb


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