To make sure you get the right version for your needs, could you tell me:
Downloading AutoCAD 2016 (a 2016-era release) as a RAR file is generally handled through official, secure channels to avoid malware, specifically by accessing older, supported software via the Autodesk Account portal if you have a subscription, or through the Autodesk Virtual Agent [5.5, 5.16].
Students and educators can download Autodesk products for free, although they typically only offer the current version plus the last 3-4 years (2020-2022 and later) [5.1, 5.16].
Are you using this for , student , or commercial purposes? Do you have an existing license key or Autodesk Account, or Is it for Windows or Mac ?
Once I know this, I can provide the most direct, secure steps.
Use the Autodesk Virtual Agent to find download links for older products, which often provides executable files (EXE) that can be extracted into installers, functioning similarly to RAR/ZIP archives [5.4, 5.5].
