How is brake horsepower measured?

Brake horsepower (BHP) is measured using a dynamometer, which assesses the engine's output power. The engine is run at various RPMs, and the dynamometer measures the torque produced, along with the rotational speed. BHP is calculated using the formula: BHP = (Torque (lb-ft) × RPM) / 5252. This measurement reflects the engine's power without any losses from the drivetrain or accessories.