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.
View Price on AmazonThe two testers drove the R2 Performance alongside a Model Y Performance at 50, 60, 70 and 80 mph. Both vehicles had their original tires inflated to the manufacturer-recommended 42 psi, had two occupants, and had their climate control system set to the same temperature. The R2 was set in its most efficient Conserve mode, while the Tesla used Chill mode.
At 50 mph, the R2 consumed 18.4% more energy than the Model Y. At 60 mph, the gap grew to roughly 26%. The Rivian used around 20% more energy during the 70-mph test, although traffic and nearby trucks may have provided an aerodynamic benefit to its upright body.
The biggest difference came at 80 mph when the Model Y’s better aerodynamics and lower weight shone through more. Over a roughly 30-mile route, the R2 used 26.5% more energy. The R2 can mechanically disconnect its front permanent-magnet motor while cruising, allowing it to operate as a more efficient pure rear-wheel-drive EV without spinning the unused motor. The Tesla can’t do this.
The R2 also used around 25% more during a low-speed stop-and-go simulation, even though this kind of driving should have reduced the aerodynamic penalty of its taller, boxier body. However, this doesn’t make the R2 an inefficient EV. It was designed with more of an off-road focus than the Model Y, with more ground clearance and better ability once the tarmac runs out.
Source: insideevs.com
