We average 8.8 imp. gallons an hour on a 180. That's with 2500rpm set to give an indicated 120-135kts depending on weather, height, QNH, how clean the prop is (honest -a quick scrape off of grass and bugs is another five kts!!!) and how well one leans off!!
Skip the 160 and get the best you can.
And the hand brake went years ago........Mind you, made slowing down interesting whilst juggling stick, throttle and brake.....
Current toe brakes amongst the best and certainly entertaining on wet grass and snow.......
DOC