The 2025 BMW M5 has once again proven that BMW’s official power figures are far from the full story. A recent dyno test conducted by IND Distribution reveals that the new M5 produces a staggering 696 horsepower and 730 lb-ft of torque at the wheels. These figures significantly exceed BMW’s official claims, continuing the tradition of understated M-car performance.
Factoring in drivetrain loss, typically estimated at 10–15%, the actual engine output could soar as high as 820 hp and 859 lb-ft of torque. Even with a conservative 10% loss, the M5’s real-world power output is still around 773 hp and 811 lb-ft—far above BMW’s claimed 717 hp and 738 lb-ft at the crank.
The M5’s impressive performance stems from its 4.4-liter twin-turbocharged V8 engine, paired with an electric motor to create a hybrid powertrain. While the internal combustion engine alone is rated for 577 hp and 553 lb-ft, the additional power from the electric motors pushes the car into supercar territory. However, the hybrid system complicates traditional drivetrain loss calculations, making the dyno results even more striking.
Despite these remarkable power figures, the M5 faces challenges in overcoming its substantial weight. At nearly 5,400 pounds—around 1,000 pounds heavier than the outgoing model—the car’s heft could limit its dynamic agility. Nevertheless, its real-world horsepower performance suggests it will feel more like an 800-hp machine on the road.
For enthusiasts, the 2025 BMW M5 offers a blend of cutting-edge hybrid technology, massive power, and traditional M-car refinement. While purists may prefer earlier, lighter iterations of the M5, the newest generation delivers a level of performance that firmly cements its place among the fastest sedans in the world.
Elizabeth Puckett