G-BBAE
The 767 is not particularly noisy in my opinion, from a pax view probably about the same as an 320, although the tone of the engines is different.
BA 767s have the same RR RB211 engines as used on their 747-400 fleet.
Like all wide bodied aircraft, if heavy, the take off roll will feel quite long and this is quite normal, as it was for the 777, A330 and the L1011 TriStar from which you take your handle
As a frequent flyer, I do like BA's version of the 767, the 2-3-2 seat configuration in economy feels less crowded than the 3-4-3 or 3-3-3 config on some other aircraft types.
Enjoy your trip
