These are the minimum system requirements as published by Autodesk. What this means is you should be able to install it and it runs. Depending on your system and file sizes and location it may not be fast but should open the drawing and allow you to work in it.
I typically recommend 64-bit and at least twice what Autodesk states for RAM and processor. If nothing else, you won't have to upgrade the hardware next year if you're at twice the requirements this year. If you work with larger files or have a lot of viewports the minimum may not be acceptable to you and if the drawing is too large then it may not even open.
System requirements for AutoCAD 2016
Microsoft® Windows® 8/8.1 Enterprise
Microsoft Windows 8/8.1 Pro
Microsoft Windows 8/8.1
Microsoft Windows 7 Enterprise
Microsoft Windows 7 Ultimate
Microsoft Windows 7 Professional
Microsoft Windows 7 Home Premium
CPU Type Minimum Intel® Pentium® 4 or AMD Athlon™ 64 processor
Memory for 32-bit AutoCAD 2016:
2 GB (3 GB recommended)
Memory for 64-bit AutoCAD 2016:
4 GB (8 GB recommended)
Display Resolution 1024x768 (1600x1050 or higher recommended) with True Color
Display Card Windows display adapter capable of 1024x768 with True Color capabilities. DirectX® 9 or DirectX 11 compliant card recommended.
Disk Space Installation 6.0 GB
Pointing Device MS-Mouse compliant device
Media (DVD) Download and installation from DVD
Browser Windows Internet Explorer® 9.0 (or later)
.NET Framework .NET Framework Version 4.5
Additional Requirements for Large Datasets, Point Clouds, and 3D Modeling
Memory 8 GB RAM or greater
Disk Space 6 GB free hard disk available, not including installation requirements
Display Card 1600x1050 or greater True Color video display adapter; 128 MB VRAM or greater; Pixel Shader 3.0 or greater; Direct3D®-capable workstation class graphics card.
Note: 64-bit Operating Systems are recommended if you are working with Large Datasets, Point Clouds and 3D Modeling.
Another note: the graphics card should not be overlooked as it can have a profound effect on the performance.
You can find the system requirements kb article at: