I have 1.3 86hp and on highway is no problem to go constantly about 150kph. Engine (when car is not well loaded) is hungry for accelerate to 180kph, for now my maximum is 195kph, but this is little bit crazy

. I don't have problems on highway, good acceleration, good speed keeping, and if something slows you down in the hill, you only gear down and push the gas pedal, don't forget that the best torque is between 3400-almost 6000rpm. And that the best gear for accelerating on highway is the 4!
My average consumption after about 19.000km is about 7.09l/100km. Mostly driven in city and on highway (and I'm not the slow one!). I think it's good result.