13 Amps on a 16 gauge extension cord wire is getting up there. 16 gauge is like "lamp cord" to my way of thinking. I personally wouldn't use on 120V if I had a 1625 Watt load except if that load was somewhat intermittent and/or the ambient temperature was low. But if you are using it on 220V instead of 120V then the amperage for a given wattage would be about half so would probably be OK. Hopefully the 120V cord has a higher insulation rating (say, 300V) for safety sake. And cheap "lamp cord" probably has a low temperature rating.
In the USA, 14 gauge wire is commonly used for 15 Amp/120V lighting circuits and typical outlets, but that's solid wire. Multi-strand cords take a bit of beating and I prefer to de-rate them a bit.
Folks, listen to Crossy. He's a "sparky". (I only worked in the electrical utility industry for 10 years or so selling electric meter test equipment. I learned a couple things.)