BMW iX3 Leads in Highway Efficiency and Range Test Against Mercedes and Volvo

In a recent comparison of premium electric SUVs, the BMW iX3 distinguished itself by demonstrating exceptional energy efficiency and extended range during a highway evaluation. This assessment pitted the iX3 against notable competitors, the Mercedes-Benz GLC Electric and the Volvo EX60, highlighting that a larger battery alone does not guarantee superior performance; efficient energy utilization is equally crucial.
The highly anticipated models, including the Mercedes-Benz GLC Electric and the Volvo EX60, entered the premium electric SUV arena with specifications that appeared closely matched on paper. However, a real-world highway test revealed a significant advantage for the BMW iX3 due to its optimized energy consumption. The testing procedure, conducted on a motorway north of Oslo by Kris Rifa and colleagues, involved maintaining a target speed of approximately 120 km/h (75 mph) under consistent weather conditions, with temperatures ranging from 14°C to 17°C (57°F to 63°F) and predominantly dry roads.
To ensure fairness, all vehicles commenced the test with a 90% charge and operated in their most energy-conserving modes. Drivers rotated positions and lead vehicles to mitigate external factors such as wind resistance and elevation changes. An Xpeng G9, a larger SUV, also participated in the test, primarily for battery size comparison, although it was not a direct competitor to the other three models.
Upon completion of the route, the BMW iX3 recorded the lowest energy consumption at 19.4 kWh/100 kilometers (approximately 3.2 miles per kWh). In contrast, the Mercedes-Benz GLC achieved 20.3 kWh/100 km (3.06 miles/kWh), and the Volvo EX60 registered 21.1 kWh/100 km (2.94 miles/kWh). This indicates that the BMW consumed roughly 4% less energy than the Mercedes and 8% less than the Volvo, underscoring its superior efficiency.
Coupled with its substantial 108.7 kWh usable battery capacity, the iX3's efficiency translated into a considerable range advantage. After accounting for a 3% deduction for heat and discharging losses, the iX3 boasted an estimated range of 338 miles (544 km), significantly outperforming the GLC's 279 miles (449 km) and the EX60's 260 miles (419 km).
It is important to note that the Volvo EX60 P10 model used in the test was not its highest-tier variant, which would have been the P12, featuring a larger 112-kWh battery. While Volvo suggests the P12 is marginally more efficient (by 0.1 kWh/100 km), calculations based on the observed efficiency indicate that even the P12 would have achieved a theoretical range of 320 miles (515 km), still 18 miles (29 km) less than the iX3.
One factor potentially contributing to the Volvo's reduced efficiency was its 22-inch wheels, which were larger than the 20-inch wheels on both the BMW and Mercedes models. Despite this, the Volvo EX60 received high praise from drivers for its subjective comfort, particularly its quiet interior and smooth ride. The Mercedes-Benz GLC was also commended for its comfortable seating, responsive steering, and overall refined driving experience. The iX3 has also previously demonstrated impressive efficiency in mixed driving conditions and even achieved a remarkable 626 miles on a single charge in a hypermiling test, underscoring its long-distance capabilities.
This comprehensive highway test highlights the BMW iX3's leading position in electric SUV efficiency and range. Its combination of a robust battery and optimized energy usage allows it to travel further on a single charge compared to its luxury counterparts. While driver comfort and other features remain important considerations, the iX3's performance underscores the growing emphasis on practical, long-distance capabilities in the evolving electric vehicle market.