As well as having reduced smoke emissions, the new engine was much more powerful than the existing ones. The new six-cylinder engine produced 150 hp (110 kW), compared with 105 hp (78 kW), and later modifications produced 225 hp (168 kW) and 260 hp (190 kW) By April 1917 one hundred engines were being produced a week. A total of over 8,000 of his tank engines were put into military service, making it the first British-designed engine to be produced in large numbers.