Isentropic compressibilitieS K-S, excess isentropic compressibilitieS K-S(E) and excess molar volumes VF have been determined from measures ments of speeds of sound u and densities p on binary mixtures of propan-2-ol, butan-2-ol, pentan-2-ol, and octan-2-ol with cyclohexane and of butan-1-ol, pentan-1-ol, hexan-1-ol, and heptan-1-ol with methylcyclohexane at 303.15 K over the whole mole fraction range. The values of V for all the eight mixtures are positive and the values of V-E decrease with the number of carbon atoms in alkanol. The values Of K-E for all four alkan-2-ol + cyclohexane systems are positive while in case of alkan-1-ol + methylcyclohexane systems, positive values Of K-S(E) for butan-1-ol + methylcyclohexane decrease to negative values for heptan-1-ol + methylcyclohexane. The change of sign occurs between pentan-1-ol and hexan-1-ol. The experimental speeds of sound have been analysed in terms of Schaaffs' collision factor theory and Jacobson's free length theory while the excess molar volumes of alkan-1-ols + cyclohexane, alkane-2-ols + cyclohexane and alkan-1-ols + methylcyclohexane, have been analysed in terms of associated solution theory with a Flory equation of state contribution described by Treszczanowicz and Benson [Fluid Phase Equilib. 23 (1985) 117] and Heintz [Ber. Bunsen. Phys. Chem. 89 (1985) 172]. (C) 2003 Elsevier B.V. All rights reserved.