Which is more efficient? A jet engine, or a propeller engine?

I'm sure a jet engine is more powerful, but which engine would move 1000 pounds of freight from point A to point B using the least amount of fuel.
Update: What I'm ultimately trying to figure out is a pump design in my mind, and I'm wondering if piston pumps could be more efficient than pelton wheel type designs. It's not just an abstract idea. What I've been thinking is of a 3 cylinder radial pump, and 3 cylinder radial airplane engines were... show more What I'm ultimately trying to figure out is a pump design in my mind, and I'm wondering if piston pumps could be more efficient than pelton wheel type designs. It's not just an abstract idea. What I've been thinking is of a 3 cylinder radial pump, and 3 cylinder radial airplane engines were considered the hot thing right before jet engines came out. I'm wondering if the 3 cylinder radial pump could be an improvement, especially at low rpm's. I know that's not what I asked, but that's what I'm trying to figure out. :)
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