Not reliably. The image may load but will run out of memory under moderate traffic. You need at least 512 MB.
command in the configuration points to this new file to avoid boot loops or falling back to a ROMmon prompt. : Always verify the MD5 or SHA512 checksum c1900universalk9mzspa1583m7bin
This image is built for the (ISR G2), including models like the 1921, 1941, and 1941W. Not reliably
Without a license, features like Advanced Security are in evaluation mode (60–90 days). including models like the 1921
⚠️ Do attempt to load this image on an older 2800 or 3800 series router – it will fail and may corrupt the flash.