Originally Posted by
GetSetJetSet
I believe the 748i is more fuel efficient than the 388
I think it depends on passenger load/cargo load/distance.
Regardless, neither is as efficient as the more recent twin engine long haul aircraft (777-300ER, 787-8, 330-300). And everything currently flying will be less efficient than the next generation of twin engine long haul aircraft.
Considering that the passenger loads and range of the next generation will approach the 744, it is easy to see why the era of the four engine jet airliner as coming to an end.