According to my own calculations, he'd be in the 600-650 W range to get up to 60 km/h.
240 W would mean 38 km/h by the same math.

The linked page has some major errors in it.

This site, on the other hand, seems to overestimate power a good deal (giving almost 1400 W for the same situation as above). But I suspect the numbers are skewed intentionally too show recumbents in a better light as the site appears to be a recumbent propaganda tool...