Difference between AutoCAD and Inventor

Issue:

You are an AutoCAD LT user who wants to start creating 3D drawings and need to know whether to choose AutoCAD or Inventor.

Solution:

Both AutoCAD and Inventor can create 3D Models. There are various considerations to decide which is  the right one for your needs. 
 

AutoCAD Versus Inventor

	AutoCAD	Inventor
General	2D drafting software that can do 3D pretty well	Pure 3D  object-oriented software
Interface	Communicates with toolbars, context-sensitive shortcut menus, dialog boxes -- and a command line	Communicates with toolbars, context-sensitive shortcut menus, and dialog boxes
Industry Focus	Integrates with industry-specific tools such as AutoCAD Architecture, AutoCAD Electrical, AutoCAD Civil 3D, and AutoCAD Mechanical	Focuses on mechanical design
Modeling	Geometry-driven models	Parametric models, with features such as holes, chamfers, fillets, etc.
File handling	"All-in-one" file	Distinguishes between assemblies, parts, and 2D drawings
Usage Example	Creates a machine	Simulates how the machine actually moves
For more information	AutoCAD product page	Inventor features page