I have 2 different, but similar, of these solenoids. My bench supply only goes a little over 5A. Applying 9V to either of these solenoids clearly drew well over 5A. The lowest voltage these solenoids would actuate at was 3V, where they just barely didn't max out my power supply, drawing a little over 5A.
3V / 5A gives 0.6 ohms. Even though I originally stated 1 ohm, they are now both testing at about 0.7 ohms. If my math is correct, that's close to 13A, and about 115W.