You can definitely say that the original RB
.211 was late and heavy and that this "almost destroyed" the TriStar programme. RR
was much smaller than either of its US rivals and had no military contract on which to develop high-bypass engines, didn't understand the big US market and took too many risks. Performance-wise, all the early big engines were dreadful...
You simply can't compare any of them to the later derivatives, particularly the -524.
wanted fleet commonality between the 74 and 76... The engine has done well in the 747, for which it was designed. However, BA
found itself operating its 767's on very short routes, such as London-Paris. The engines were optimised for long-haul use, and of course were less suitable.