Well with the first Doctor it is contradicted weather it is old or new at the time it is show to be only slightly outdated with the monk having a type 40 mark IV whilst the Doctor’s is a mark III but latter sources suggest it was already a museum piece. However by the eighth doctor’s era it is massively outdated, as time lord are preparing to start using type 103 forms. After the TARDIS is destroyed the Doctor briefly replaces it with his Companion Compassion who become a type 102. By the time war there are possibly at least some type 400’s.