From a.y. 2000/01, Politecnico di Torino implemented DM 509/99. The decree introduced in the Italian university system the 3+2 formula. A three years Bachelor Decree can be followed by a two years Master degree. 
From a.y. 2010/11, Politecnico di Torino implemented DM 270/04. Keeping the 3+2 formula, a revision of study plans was necessary as the distinction of the two degree types increased. 
Politecnico included English Language as compulsory course in Bachelor degree, asking for the IELTS certificate (minimum 5.0 points), or equal certification acquirement. Certifications equivalents are established by CLA, and can be seen on https://didattica.polito.it/cla/it/certificazioni/.
The same English certificate is required also for Master degree courses. Master students who have already achieved here the Bachelor degree won’t have to resubmit the certificate. Those who obtained the Bachelor degree in another university shall submit it.
In any case everyone must check the English language level achieved for obtaining the Master degree. 
Particularly, from Academic Year 2014/2015, the minimum IELTS point required for Automotive Engineering Master degree is 5.5.