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Earlier quoted context omitted.
One of the biggest factors is cabin altitude. Both the Boeing 787 and the Airbus A350 XWB have a lower (than previous airliners) cabin altitude of 1,800 m. Note that some private jets do quite a bit better again: the Gulfstream G650 has ~1480 meters.
Concorde cabine altitude was set to 1,700 metres or 5,500ft...
1: https://en.wikipedia.org/wiki/Concorde#Cabin_pressurisation
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The reason for that is that the concorde used afterburners (basically, pump fuel into the high speed exhaust for extra thrust) which are incredibly inefficient. Great for a fighter jet where you need a sudden burst of extreme thrust, but not something you want a long-haul airliner to use. Boom uses turbofan engines to reach supersonic speeds which are much, much more efficient. In fact, many airliners could theoretic…
> The reason for that is that the concorde used afterburners (basically, pump fuel into the high speed exhaust for extra thrust) which are incredibly inefficient. Concorde didn't use afterburners "at speed". The afterburners were used for takeoff, and to go through the mach wall. Concorde burned insane amounts of fuel on the ground because turbojets are very inefficient at low-speed. Not unlike the SR-71's really (th…
Earlier quoted context omitted.
Concorde cabine altitude was set to 1,700 metres or 5,500ft...
According to Wikipedia it was also 1,800m. [1] 1: https://en.wikipedia.org/wiki/Concorde#Cabin_pressurisation
https://www.heritageconcorde.com/concorde-pressurization-sys...
Airliner cabins are usually pressurised to 6-8,000 ft (1,800-2,400 m) elevation while the aircraft flies much higher. Concorde’s pressurisation was set to an altitude at the lower end of this range, 6000 feet.
https://museedelta.wixsite.com/musee-delta/single-post/2020/...
The two independent and fully automatic air conditioning units provide a cabin altitude of 5,500 ft (1,600m) at flight level 590.
https://books.google.fr/books?id=aekGAgAAQBAJ&pg=PA506&lpg=P...
Concorde's pressurisation was set to an altitude at the lower end of this range, 6,000 feet (1,800 m).
Bottom line is 1700 or 1800m, Concorde did that 50 years ago...