German light cruisers needed minimum speed of 27,5 knots to escape from British battle cruisers according to the Dutch magazine Marineblad dated 1909-1910 no. 3

German cruiser SMS Strassburg (later the Italian Taranto)

British Invincible-class battle cruisers

An item reported that the two small German cruisers to be laid down that year (1) would have a displacement of 4.500 ton instead of the 4.300 ton  of the Mainz and with a horsepower of 30.000 instead of 20.000 hp. The intentioned to achieve a minimum speed of 27 miles necessary to escape from the Invincibles.

Notes
1. In 1910 were the 4 light cruiser of the Magdeburg-class namely the Magdeburg, Breslau, Strassburg and Stralsund laid down with a horsepower of 25.000 hp, a speed of 27,5 knots and a displacement of 4.570 tons. This class was preceded by the Kolberg-class and succeeded by the Karlsruhe-class. The Mainz was part of the Kolberg-class.
2. British Invincible-class battle cruisers consisting of the Invincible, Indomitable and Inflexible. General technical specifications of this class. A displacement of 17.530 tons/17.250 long tons (loaded)-20.750 tons20.420 long tons (deep loaded) and as dimensions 172,8 (over all) x 23,9 x 9,1 (deep loaded) metres or 567 x 78.5 x 30 feet. The two paired sets of Parsons direct-drive steam turbines and 31 Yarrow water tube boilers supplied via 4 shafts 41.000 shp (design) allowing a speed of 25 (design)-26 (trials) knots and with a speed of 10 knots and maximum coal bunker capacity of 3.050 tons/3.000 long tons and 737 tons/725 long tons fuel-oil a range of 3.090 nautical miles. The crew numbered 784 men. The armour consisted of a 10,2-15,2cm-4-6” thick belt, 3,8-6,4cm/1.5-2,5” thick decks, 6,4cm/2.5” thick torpedo bulkheads with the gun turrets, barbettes and conning tower protected by respectively 17,8cm/7”, 17,8cm/7” and 15,2-25,4cm/6-10”. The armament consisted of 4x2-30,5cm/12” Mk X breech loading guns. 16x1-10,2cm/4” quick firing Mk III guns, 7 Maxim guns and 5z1-45cm/18” submerged torpedo tubes. The Inflexible and Indomitable were around 1918 also fitted out with a Sopwith Pup and a Sopwith 1½ Strutter. Their flying-off platforms fitted out with a canvas hangar were situated on top of the P and Q turrets.