Vapour pressures of 1,4-di-tert-butylbenzene (379-1647 Pa), 1,3,5-tri-tert-butylbenzene (203.9-241 Pa), 1-methyl-3,5-di-tert-butylbenzene (16.7-435.8 and 1318-103,880 Pa), and 1,2.2-trimethylpropybenzene (36.3-287.4 Pa) have been measured using a transpiration method and an ebuliometric method. Based on the literature and obtained by the authors experimental data a comparative study of prediction capabilities of the following methods has been carried out: Ambrose-Walton's, Lee-Kesler's, Riedel's and the modification of Riedel's method made by Vetere. (c) 2008 Elsevier B.V. All rights reserved.