Old-fashioned or underpowered; archaic. This term does not have a strong negative loading and may even be used semi-affectionately for something that clanks and wheezes a lot but hangs in there doing the job.
In the 19th century, steam-powered printing presses led to mass circulations newspapers and magazines.
Inspired in part by the power of industrial machinery, Babbage set about designing a steam-powered calculating machine.
The Federal Navy at that time had grown to a fleet of more than 550 steam-powered ships.