Also they are at summer temperatures.
You're spot on. We can argue all day about what constitutes a 'real world' drive cycle, but the most glaring error of the test cycle is the starting temperature. The rolling resistance of the tyres and the friction of the drivetrain and engine all increase massively at low temperatures, so starting at a more realistic 10C rather than a balmy 20-25C would have a big impact on the figures.
They don't take into account braking
Yes they do!
The EU test cycle doesn't use aircon or electrical accessories.
Rain is a big factor, since the rolling resistance of tyres is much higher on a wet road is much higher than on a dry one and the splashed water keeps cooling the tyres and gearbox.
My observed economy is very similar to your Ka with a similar winter/summer split.
Renault claim 37.7 combined-I average 43 on a long term basis, but that does require a few tricks.
Edited by unthrottled on 02/05/2012 at 00:48
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