Fuel efficient cars that really can deliver more than 60mpg

Kia Rio
Modern cars' boasts of amazing mpg figures are all very well, but how many of them deliver anywhere near the same results in real life as as they do in the laboratory? That's exactly what What Car?'s True MPG techncians find out with their own fuel efficiency tests, which they carry out on normal UK roads in normal UK driving conditions. 
18 months into the True MPG programme, its technicians have announced the most efficient cars that they've tested so far. What have they got in common? All of them are small cars, and all of them are diesel.
In order of their true fuel economy, these are:
1. Kia Rio 1.1 CRDi Ecodynamics
Official mpg: 88.3mpg
True MPG: 70.6
The best True MPG result recorded so far is 70.6mpg, from the Kia Rio 1.1 CRDi Ecodynamics. The Government figure is 88.3mpg.
2. Citroen C3 1.4 e-HDi
Official mpg: 83.0
True MPG: 70.3
This Citroen C3 is almost as efficient as the Kia Rio – the 1.4 e-HDi C3 managed 70.3mpg, which was 12.7mpg below its official figure of 83.0mpg. It’s the only car in the top nine that was tested with an automatic gearbox.
3. Honda Civic 1.6 i-DTEC
Official mpg: 78.5
True MPG: 66.4
The largest car in this list is the Honda Civic 1.6 i-DTEC. The hatchback has a quoted fuel economy of 78.5mpg, but achieved 66.4mpg in the hands of What Car?'s True MPG technicians.
4. Ford Fiesta 1.6 TDCi Econetic
Official mpg: 78.5
True MPG: 62.1
The Ford Fiesta is the best-selling car in the UK. Our results show that the 1.6 TDCi Econetic is the most frugal model in the range. Our team recorded 62.1mpg, while the Government data quotes 78.5mpg.
5. Dacia Sandero 1.5 dCi
Official mpg: 74.3
True MPG: 61.7
The Dacia Sandero is not only cheap to buy – our data suggests it will be cheap to fuel as well. Our technicians recorded 61.7mpg against official economy of 74.3mpg. 
6. Vauxhall Corsa 1.3 CDTi Ecoflex
Official mpg: 85.6
True MPG: 61.4
The Corsa Ecoflex's official 85.6mpg is one of the highest claims of any new car. In real-world tests we found a 24.2mpg shortfall, although 61.4mpg still makes it one of the most efficient cars tested by the True MPG technicians.
7. Hyundai i20 1.1 CRDi
Official mpg: 74.3
True MPG: 61.1
The i20 1.1 CRDi shares the same three-cylinder engine with the Kia Rio 1.1, but isn't quite as efficient in this guise. It managed 61.1mpg along the True MPG test route.
8. Fiat Panda 1.3 Multijet
Official mpg: 72.4
True MPG: 61.0
The Panda Multijet is the smallest car in this list, which makes it the most frugal city car we've tested so far. Our technicians recorded 61.0mpg against official fuel economy of 72.4mpg.
9. Renault Clio 1.5 dCi
Official mpg: 78.5
True MPG: 60.1
Renault's 1.5 dCi engine is also available in the Captur mini-SUV, but in the Clio it achieved 60.1mpg in our True MPG tests.
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