 The ship was powered by two four-cylinder inverted vertical triple-expansion steam engines, each driving one propeller. A dozen Yarrow water-tube boilers provided steam to the engines which produced a total of 12,500 indicated horsepower (9,300 kW) which was intended to allow them to reach a speed of 19.5 knots (36.1 km / h; 22.4 mph). The engines proved to be more powerful than anticipated and Triumph exceeded 20 knots (37 km / h; 23 mph) during sea trials. She carried a maximum of 2,048 long tons (2,081 t) of coal, enough to steam 6,210 nautical miles (11,500 km; 7,150 mi) at 10 knots (19 km / h; 12 mph). In service she and her sister proved to be more economical than first thought with an estimated range of 12,000 nautical miles (22,000 km; 14,000 mi) at 10 knots.
