True MPG: most and least efficient family cars
What Car?'s True MPG tests show what fuel economy you can really expect from a car. Here, we reveal the best and worst performing family hatchbacks...
4. Hyundai Ioniq Plug-in
True MPG 51.8mpg
The Hyundai Ioniq is available as a fully electric car, a conventional hybrid and this plug-in model, which can travel almost 40 miles on electric power before its petrol engine needs to cut in. However, even with the batteries flat at the start of the test, it's efficient enough to take fourth place on our family car list.
3. Seat Leon 1.0 TSI
True MPG 53.1mpg
This is the first of two appearances for the Seat Leon. We've found its turbocharged 1.0-litre engine to be ideally suited to city streets and reasonably punchy on faster roads, but it's not as refined as some of the more powerful four-cylinder petrol engines on offer.