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We use ALEPH data on hadronic τ decays in order to calculate Euclidean coordinate space correlation functions in the vector and axial-vector channels. The linear combination V-A receives no perturbative contribution and is quantitatively reproduced by the instanton liquid model. In the case of V+A the instanton calculation is in good agreement with the data once perturbative corrections are included. These corrections clearly show the evolution of α_s. We also analyze the range of validity ofdoi:10.1103/physrevlett.86.3973 pmid:11328073 fatcat:l2mdnal3kbckzhn5op5b5j5zvu