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Get emergency Roadside Assistance now. Roadside Assistance for electric vehicles ,,,. How it works What's included in your Roadside Assistance cover. Roadside for business We have a range of products to suit the roadside assistance needs of your business or fleet. Get insurance quote Retrieve a quote. Register here. But the tests are designed to reflect real-life driving more accurately.
This is because car owners have been complaining for years that the official manufacturer MPG figures are too high to be matched when driving on the road. Many modern cars have trip computers that record and calculate miles per gallon. Most give read outs for instant as well as long-term MPG, which you can often see on your dashboard. It can also be fun adjusting your driving style to try and increase MPG as much as possible.
The most precise way of doing it is to keep your own record. You do this by first filling the fuel tank to the brim. Every time you fill up after that, get the tank as full as possible. Subtract the starting mileage from the final figure. This gives you miles per gallon. You can see how it compares to rivals by comparing their official MPG figures. In order to standardise how figures are obtained — ensuring that claims can be meaningfully compared between different cars — every carmaker selling cars in Europe follows the same measurement system.
For many years, car manufactures provided figures for driving at a constant 56 and 75mph, and another for urban fuel consumption. However, during the s it was determined that a more representative system was required.
The NEDC fuel-economy test takes 19 minutes 40 seconds to perform and is broken down into three parts — each of which provides an official fuel-consumption figure. In our description of the tests, all times are given in seconds and speeds are in kilometres per hour kph.
The test description is for a manual car — automatics follow the same procedure, but any references to the clutch can be ignored. This first part of the test takes s, covers a theoretical distance of slightly more than metres and is repeated four times without pause.
The test procedure is as follows:. The test car idles for 6s in neutral gear, then 5s in first gear with clutch engaged. It then accelerates over 4s to reach 15kph and cruises for 8s. It then brakes to a full stop over 5s, the clutch being disengaged for the final 3s. The car then idles at a standstill for 21s, the last 5s of which the car is in first gear with the clutch disengaged. The car then accelerates in first gear for 5s, then after a 2s changes gear, spending 5s in second gear until 32kph is reached.
It then cruises at this speed for 24s before gradually braking to a full stop in 11 seconds clutch disengaged for the last 5s.
It idles at a standstill for 21 seconds, the last 5s of which the car is in first gear with the clutch disengaged. The car then accelerates to 50kph over 26s, stays in first gear for 5s, performs a 2s gearchange and then spends 9s in second gear. After another 2s gearchange, it spends 8s in third gear. It then cruises at 50kph for 12s before decelerating over 8s to 35kph.
After four repeats, a total of distance of 3, metres is covered at an average speed of The second part of the test occurs immediately after the urban cycle. It covers a theoretical distance of 6, metres. The test car idles for 20s before slowly accelerating over 41s, spending 5s in first, 9s in second, 8s in third and 13s in fourth gear allowing 2s for each gearchange to reach 70kph.
It then cruises at this speed for 50s in fifth gear and then decelerates over 8s to 50kph, changing down to fourth gear after 4s. The car then cruises at 50kph for 69s, before accelerating over 30s to kph.
It cruises at this speed for 30s, in fifth or sixth gear. It then accelerates for 20s to reach kph, cruising at this speed for 10s, and then gradually brakes to a full stop over 34s.
Once at a standstill, with the clutch disengaged and the car in neutral, the car idles for 20s. The NEDC test cycle is then complete. It measures the total fuel used over the theoretical test distance of 11, metres, at an overall average speed of Plug-in hybrid cars typically have extremely impressive official fuel-economy figures, because the simulated driving cycle described above precisely suits the nature of plug-in hybrids.
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