Using a variable volume high-pressure cell, bubble and dew points of the binary systems carbon dioxide+ methylcyclopentane and carbon dioxide + isopropylcyclohexane were measured at temperatures ranging from 292.75 to 373.45 K. The saturation pressures, ranging from 10.6 to 169.8 bar were measured at carbon dioxide mole fractions between 0.1021 and 0.9700. For these two systems, no literature data were available. The experimental results were correlated with the PPR78 model. The average absolute deviations between experimental and predicted saturation pressures are respectively of 4.90 and 5.54 bar for the carbon dioxide + methylcyclopentane and the carbon dioxide + isopropylcyclohexane systems. (c) 2007 Elsevier B.V. All rights reserved.