Re: Consumer Reports scale --
-- A quick Google does not reveal t he details of the scoring system. A deeper one probably would. Here's what CR wrote:
"In rating it, however, we faced a quandary: The Tesla initially scored 103 in the Consumer Reports‘ Ratings system, which by definition doesn’t go past 100. The car set a new benchmark, so we had to make changes to our scoring to account for it. Those changes didn’t affect the scores of other cars."
FWIW.