Both ships were rated for a top speed of 30 knots (56 km/h; 35 mph); Bismarck just exceeded this speed on sea trials, reaching 30.01 knots (55.58 km/h; 34.53 mph), while Tirpitz made 30.8 knots (57.0 km/h; 35.4 mph) on trials. This difference was largely the result of a significant increase in horsepower for Tirpitz, which reached 163,023 PS (160,793 shp; 119,903 kW), compared to 148,116 for Bismarck. The two ships had different fuel stores; Bismarck was designed to carry 3,200 tons of fuel oil, but could store up to 6,400 tons of fuel in a normal configuration; with extra fuel bunkers, the fuel carried could be increased up to 7,400 tons.