Originally Posted by
Globaliser
This is not correct.
Concorde seat dimensions (both width and pitch) were more comparable to current premium economy.
Pitch was comparable.
Concerning width:
E-jets are 11 cm wider than Concorde, with cabin width 274 cm (108创).
Embraer offers seatbacks of 18,25创, with 20创 aisle - that leaves 15创 for 6 armrests and wall gaps, so makes sense. Concorde seats must have been narrower.
Boeing offers 18,5创 seatbacks at 9 abreast 777 - and rather more at 8 abreast.
Thus Concorde seats must have been narrower than current economy (at least on 9 abreast 777), let alone premium economy.