 The TR3 was restyled in 1957 and was available with a larger 2.2 litre; engine; the restyled car was unofficially known as the TR3A.A further development, with the larger engine as standard and with a fully synchromesh gearbox, was made available in 1962, the final year of TR3 production.This last version of the TR3 was unofficially known as the TR3B.