Interestingly, the previous Model S Long Range with 402 miles of range had a combined 117 MPGe rating (City MPGe:121 – Highway MPGe:112) and the new Monroney sticker shows that the efficiency went down.
It now shows a combined 116 MPGe rating (City MPGe:119 – Highway MPGe:113).
Tesla improved the efficiency on the highway, but it went down for city driving.
Normally, if the efficiency goes down, but the range goes up, it means that Tesla increased the energy capacity of the battery – though we can’t confirm that for now.
Recently, we learned that Tesla upgraded the energy capacity of its Model 3 Long Range battery pack, but Model 3 doesn’t use the same battery cells as Model S.
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