The R2 and Model Y share an EPA efficiency rating, but their real-world energy use differed widely.
The R2 lost every part of the comparison, including the low-speed test where the difference should have been smaller.
Different EPA test procedures may explain why the official ratings look more similar than the cars actually are.
On paper, the Rivian R2 matched the Tesla Model Y’s efficiency numbers. However, while their EPA efficiency aligns, side-by-side testing reveals the Rivian uses considerably more juice than the Tesla. That’s a remarkable performance for the taller, boxier, and heavier R2, although the numbers don’t quite hold up in real-world tests.
This head-to-head test by Out of Spec Reviews and RivianTrackr lines up the most powerful Performance versions of both models. Officially, they have the same 105 MPGe efficiency rating from the EPA, which is equivalent to an average electricity consumption of 32 kilowatt-hours/100 miles, or 3.125 miles/kWh.
