The 1.6 is a gutless engine so you're not going to get rocket-ship performance at motorway speeds. Keep the oil regularly changed and don't thrash it - the piston rings tend to disintegrate on these at 100k-plus miles if they are not looked after and the engines can't be (aren't designed to be) rebuilt.
If it's a 5-door model then check the bottoms of the rear doors and the rear arches, they seem to be more prone to rust on the 5-door models. The rear trailing arm bushes will need doing soon as well.