I had a 290bhp one a few years ago and would get 220/230 miles too a tank taking it easy to work and back ect
But if I would do a long motorway journey (not doing 60 as that's boring)
Just a steedy constant speed 75/80? Would get more like 280/300 miles too a tank
As you know I have a heavy foot so in these figures there will be a few blasts