Jules Ferry
The ships had three vertical triple-expansion steam engines, each driving one propeller shaft. Each of the sisters used a different model of water-tube boiler and "Jules Ferry" was fitted with 20 Guyot-du Temple boilers. Their engines were rated at a total of to reach their designed speed of . During her sea trials on 7 December 1906, "Jules Ferry" reached from . The cruisers carried enough coal to give them a range of at a speed of .