This question is always asked in magazines and reviews. But I have to say after having driven all 3 i would say that the 172 is the best of three. It just gives me the feeling that whenever you are driving it economically/normally theres a 2.0 litre 16v 170 bhp monster just waiting to come out bite you! Although the other two are no slouches, 172 is the one for me. Wot do all you think?