Idea: Basically a Concorde with less fuel but offset by having much more efficient engines.
Concorde 200 - from 1994
Seats: 160 same as the standard Concorde
Speed: 1355 mph same as the standard Concorde
Range: 7765 mi ~85% longer range; this number is based on a full 160-seats-filled Concorde
Turn Time: 60 min same as the standard Concorde
Runway: 8660 ft lowered by ~8,35% due to reduced weight
Price: $180 Million ~20% higher price
Lease: $2 Million ~20% higher monthly lease
Now to the engines:
We will assume a plane for 160 max passengers needs only 2 engines - we're also gonna ignore any mistakes in my "math" shenanigans.
Number of engines: 2
Engine Type: Rolls-Royce Trent 768
Thrust per engine: 67'500 lbs significates a total increase of nearly 8%
Weight per engine: 10'550 lbs 3550 lbs (~50%) more per engine
combined Fuel Flow: 40'500 lbs/hour equals around 73% less fuel consumption
The Trent engines, straight off the A330, are heavier by themselves but due to the reduced amount of engines, this change saves in total 7100 lbs of weight. In addition to this, the number of fuel tanks will be slightly reduced (the -200 will retain it's feature of additional fuel tanks to control the centre of mass like the original) and the maximum fuel capacity lowered by 50% to a total of 59'750 litres (44'812 lbs for a full cabin).
The much more efficient engines will be able to work flights up to 5:45 h long flights in regular service. This signigicates an additional 2:50 hours of travelling.
a few potential destinations from London Heathrow; transatlantic routes only
Orlando, Mexico City, Miami, Sao Paulo, Fort Lauderdale, Bogotá
all these Airports have demand for at least one daily flight in full economy