Not really.
Acording to this guide from Sophos, that SG 230 rev 1 has a Pendium Dual Core 3,2 GHz, and 8Gb of ram.
https://www.infinigate.de/fileadmin/user_upload/Vendors/Sophos/Products/sophos-sg-series-sizing-guide-sgde.pdf
SG 310 has an i3, so it will be cheaper to get your hands on some...