Originally Posted by
FlyingDL4Fun
4) B757 - 2 engines, much more narrow than the 76, 2 paris ofwheels on main gear
5) B737 - 2 engines, short fuselage, 1 pair of wheels on main gear
6) A320/A319 - looks like 737, but taller off the ground, distinct "notche" from nosecone to cockpit windows
As for the 757/737/A320/19 differences, don't forget the doors. The 757 has 3+ doors on each side while the 737/A320/19 have only two and overwing exits.
Also the 757's stance is quite unique. The nose gear is quite a ways back which makes the cockpit look like it is sticking out more. See the pictures below for examples.
757
737
A320