L'Alvis TC21 fut introduite en 1953 en remplacement de la TA21, avec de petits changements mécaniques qui améliorèrent les performances. L'Alvis TC21 utilisa le même 6 cylindres que la TA21.
   La TC21 ne vint qu'en version "Sports Saloon" alors que les versions précedentes eurent des cabriolets.

L'Alvis TC 21  fut produite de 1953 à 1954.
2 motorisations sont sur Histomobile de 3L à 3L présentant des puissances de 93ch à 100ch.
L'Alvis TC 21  a été produite en 850 exemplaires.

The Alvis TC21 was introduced in 1953 as a replacement for the TA21, it introduced some minor mechanical changes which enhanced the models performance. The Alvis TC21 used the same 3.0 litre six cylinder engine as the previous car although it now had an improved cylinder head design and better manifolding.
   The TC21 came only as a "Sports Saloon" unlike earlier models which had also been available as drophead coupes. Production of the TC21 continued until 1954.

The Alvis TC 21  was produced from 1953 to 1954.
The datas with 2 different engines from 3 to 3 liters and powers from 93hp to 100hp, are below.
850 units were produced.