 Imperator Aleksandr III was fitted with four Parsons-type steam turbines imported from John Brown & Company of the United Kingdom. They were designed for a total of 26,000 shaft horsepower (19,000 kW), but produced 27,270 shp (20,340 kW) on trials. 20 mixed-firing triangular Yarrow water-tube boilers powered the turbines with a working pressure of 17.5 atm (257 psi). Her designed speed was 21 knots (39 km / h; 24 mph). Her maximum coal capacity was 1,700 long tons (1,727 t) plus 500 t (490 long tons; 550 short tons) of fuel oil which gave her a range of 1,640 nautical miles (3,040 km; 1,890 mi) at 21 knots (39 km / h; 24 mph). All of her electrical power was generated by three Curtis 360-kilowatt main turbo generators and two 200-kilowatt auxiliary units.
