fuel consumption efficiency

Hi all, i m working on a creative writing project including the description of a Lockheed Hudson mk III on a long range flight. I cannot seem to find after how long the aircraft needs to refuel. Most sources eg Wikipedia indicate a range of 1960 miles, a cruise speed of 220 mph and an endurance...

So in WW2, both radial and in-line engines are used, if both engines had the same cubic inch volume, which would be more fuel efficient? (If there was a difference)