It is a moot point. Having seen (but not driven) model S, I can't say it looks big enough to warrant comparison to a 7-series, and even then latter is 1800kg [0

It is a moot point. Having seen (but not driven) model S, I can't say it looks big enough to warrant comparison to a 7-series, and even then latter is 1800kg [0], so Model S is still 17% heavier or causing 1.85 times road wear. Point about trucks stands of course, as you've pointed in the other comment. 3-4 orders of magnitude more road wear - that's crazy! I wonder how does that translates to truck road taxes. [0] http://www.bmw.com/com/en/newvehicles/7series/sedan/2015/showroom/technical_data.html http://www.bmw.com/com/en/newvehicles/7series/sedan/2015/sho...