 Their machinery system consisted of 2-shaft 4-cylinder vertical triple expansion engines. They were supplied with steam by 16 Belleville boilers. Habsburg's powerplant was rated at 15,063 indicated horsepower (11,232 kW), which produced a top speed of 19.62 knots (36.34 km / h; 22.58 mph). Árpád's system was slightly less efficient, at 14,307 ihp (10,669 kW), though it achieved a comparable speed of 19.65 knots (36.39 km / h; 22.61 mph) on trials. Babenberg had the most powerful engines of the three, which ran at 16,000 ihp (12,000 kW) and provided a top speed of 19.85 knots (36.76 km / h; 22.84 mph).
