We present a comprehensive asteroseismic study of the double-mode high-amplitude \delta Scuti star HD 187642 ( RV Ari ) .
The modelling includes some of the most recent techniques : 1 ) effects of rotation on both equilibrium models and adiabatic oscillation spectrum , 2 ) non-adiabatic study of radial and non-radial modes , 3 ) relationship between the fundamental radial mode and the first overtone in the framework of Petersen diagrams .
The analysis reveals that two of the observed frequencies are very probably identified as the fundamental and first overtone radial modes .
Analysis of the colour index variations , together with theoretical non-adiabatic calculations , points to models in the range of [ 7065,7245 ] K in effective temperature and of [ 1190 , 1270 ] Myr in stellar age .
These values were found to be compatible with those obtained using the three other asteroseismic techniques .