I'm more than happy to bow down to greater knowledge. I only speak as someone with an interest but...
I had a pal many moons ago who's Pa was a Trident captain. He (Ian's Pa) claimed that the Trident 2 was the fastest airliner and indeed I can remember reading the same in the Guiness book of records circa 1972.
Mind you, his Pa also told me that every aircraft landed bu a Trident had a controlled crash. He also told me that they were a bugger to get off the ground(?)