No - there's no overlap in the models and there's no commonality other than the model names. The first Triumphs built at Hinckley all had three cylinder water- cooled engines of 750 and 885cc. Becuase it was a modular design, they also made a four cylinder 1200cc variant.
Production Meriden Triumphs were all air-cooled - the commonest of which were parallel twins of 500/650/750cc. They also built a 750cc aircooled triple.
Check out this link for more detail -
http://www.ianchadwick.com/motorcycles/triumph/
[ This message was edited by: parrycm on 2007-04-08 12:18 ]