Rivian R2 uses up to 26% more energy than Model Y in real-world test

Key Points:

• Out of Spec Reviews tested the Rivian R2 Performance and Tesla Model Y Performance on the same roads and found the R2 used 18% to 26% more energy at every tested speed, contradicting their identical EPA efficiency ratings.
• The EPA ratings show the R2 matches or slightly exceeds the Model Y in combined efficiency and city cycle range, but these are lab-based numbers that often differ from real-world results.
• EPA allows manufacturers to choose different testing methods, with Rivian possibly using a more rigorous multi-cycle test and Tesla submitting derived numbers, leading to discrepancies in reported efficiency.
• In real-world driving at highway speeds, the R2’s energy consumption was significantly higher, likely due to its heavier weight and less aerodynamic shape, despite its efficient charging performance.
• Rivian’s trade-off favors utility and fast charging capability over aerodynamic efficiency, making the R2 a practical SUV with strong charging but lower real-world energy efficiency compared to the Model Y.