The Rivian R2 and Tesla Model Y have the same official EPA efficiency rating, but the former was found to use more energy in real-world testing.

The Rivian R2 and Tesla Model Y have the same official EPA efficiency rating, but the former was found to use more energy in real-world testing.

Out of Spec tested the Rivian R2 against a Tesla Model Y Performance and found it used 18-26% more energy, despite identical EPA efficiency ratings.