In this study, we test whether anticipatory Vowel-to-Vowel coarticulation varies with age in the speech of 246 adult French speakers aged between 20 and 93. The relationship between coarticulation and the known age-related change in speech rate is also investigated. The results show a gradual decrease in the amount of coarticulation for speakers from 20 to mid-50s, followed by a more abrupt decrease for speakers older than 70. For speakers in between, diverse coarticulation profiles emerge. Speech rate is also found to evolve from early to late adulthood and not only for older speakers; it shows a gradual decrease for speakers up to mid-50s and a more abrupt deceleration afterwards. Yet, the relationship between rate and coarticulation is not linear; it appears stronger for the younger speakers, with faster speakers coarticulating more, than for the adults over 70 y.o.a. Results are discussed in relation to possible changes in the parametrization and coordination of speech units at different ages