For Airbus they use A3XX-BCD
Where XX is the family of aircraft (A320/30/40/50/80)
And -BCD is their code for the specific model/engine/thrust rating of that family.
B for the specific model
C for the engine
D for thrust rating
e.g.
A330-243 is an A330-(2)00 series aircraft
powered by Rolls Royce (4) , (3) Trent 772B 320kn power
A330-244 is an A330-(2)00 powered by
Rolls Royce (4), (4) Trent 775 at 334kN thrust
Airbus A330-202 is An Airbus A330-(2)00
Powered by a General Electric (0),
CF6-80E1A4 at 311kN thrust (2)
