I find this site very useful for getting an idea on real world fuel economy for euro cars.
https://www.spritmonitor.de/en/overv...75&powerunit=2
The average fuel consumption for your car is 6.74 l/100 km or 41.91 mpg (UK) so you are a bit below the average.
The Getz are indeed giving worse fuel consumption. 7.44 l/100 km or 37.97 mpg (UK)
https://www.spritmonitor.de/en/overv...90&powerunit=2
The 1.1 Getz is a good bit better at 44.91 mpg (UK). That's a full 18 % better than the 1.3 engine Getz.
https://www.spritmonitor.de/en/overv...72&powerunit=2
I have driven the 1.1 Getz and could comfortably average high forties and even low 50's on long trips.