We bought a brand new 2009 Hyundai Getz 3 door 1.4 litre automatic because it was small and it was claimed to have fuel consumption of approx. 20 km/litre, which we reckon is about 9-10 L/100 km. When we did a fuel consumption test it only worked out to 9.4 km per litre. They stated that this was the norm. Hope you can help us.
Carmakers don't make claims in km/litre terms, so I don't know who made the claim of 20 km/litre. The official claimed fuel consumptions for your car is 6.9 L/100 km, which makes it 14.5 km/litre if you convert it to your terms. The official figures come from a standard laboratory test that every carmaker does and they're meant to be purely for comparison purposes to allow you to compare car to car, model to model, they're not a real life measure of fuel consumption. You need to recheck your actual fuel consumption before you take it back to the dealer. That way you know what it really is, and you would have something meaningful you could discuss with them.