My ISP speed is 215Mbps and on WiFi close to the router I get close to that.
WiFi upstairs gets me about 130Mbps.
Downstairs, in the same room the adaptor is getting me 150Mbps, which is acceptable.
Upstairs, the powerline adaptor is getting me 30Mbps and the tpPLC Utility says there's a link between the two adaptors of 200+ Mbps.
Is this just a case of electric circuit not being suitable and to try using a WiFi dongle?