11. This produces around 750 brake horsepower . 12. Boiler horsepower is abbreviated BHP, not to be confused with brake horsepower , below, which is also called BHP. 13. The claimed brake horsepower was 30. 14. Rest-of-world motorcycles will use kilowatts ( kW ) and brake horsepower ( bhp ) and kilowatts ( kW ). 15. This allowed for a greater airflow to the air filter, gaining a minimal increase of brake horsepower ( bhp ). 16. "Mona's Queen " was powered by two 10-cylinder P . C . 2 Crossley Pielstick engines, producing 10, 000 brake horsepower . 17. The 2008 model produced a claimed 92 brake horsepower at 8750 rpm, and weighed 186 kg ( 409 lbs ) dry. 18. With a compression ratio of 10 : 1, it developed 340 brake horsepower and 470 lb-ft of torque in 1X4-Bbl trim. 19. Her eight main engines generated 13, 500 brake horsepower ( 10 MW ) and drove propellers at both bow and stern. 20. Imperial measurements should be expressed in horsepower ( hp ), or brake horsepower ( bhp ) for British and pre-1972 American vehicles.