Performance, power and 0-100 km/h
2026 BMW X3 M50 xDrive has the quicker recorded 0-100 km/h time at 4.6 seconds, compared with 6.2 seconds for 2025 Mercedes-Benz GLC 300 4MATIC. 2026 BMW X3 M50 xDrive has the higher listed output at 398 hp; 2025 Mercedes-Benz GLC 300 4MATIC is rated at 258 hp, a difference of 140 hp. The torque figures follow 2026 BMW X3 M50 xDrive at 580 Nm and 2025 Mercedes-Benz GLC 300 4MATIC at 400 Nm. These figures describe straight-line potential only; they do not establish braking performance, ride quality, steering response or durability under repeated hard use.
Range, battery, charging and efficiency
Range and energy-use figures are either not shared by both cars or not directly comparable across these powertrain types.
Dimensions, cargo space and towing
2025 Mercedes-Benz GLC 300 4MATIC provides the larger quoted cargo volume: 600 litres versus 570 litres, a difference of 30 litres. Their listed towing capacities are equal at 2,400 kg. 2026 BMW X3 M50 xDrive is 39 mm longer overall. Exterior size is not a benefit by itself: a longer body may create useful room, but cargo shape, rear-seat space and ease of parking still require a physical inspection.
Price and overall assessment
2025 Mercedes-Benz GLC 300 4MATIC has the lower listed starting price at $48,950, compared with $63,500 for 2026 BMW X3 M50 xDrive. The measured categories split evenly, so the better choice depends on which attributes matter most. The assessment is based on the specifications shown here; it is not presented as a two-car road test.