The NEDC is supposed to represent the typical usage of a car in Europe.
March 14, 2013 11:34 AM Subscribe
Mind the Gap! Why official car fuel economy figures don’t match up to reality.
posted by three blind mice (10 comments total)
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This report provides new evidence and understanding on why there is a growing gap between the official fuel consumption and CO2 emissions of new passenger cars and vans and that which is achieved by the same vehicles on the road. It demonstrates that the current (NEDC
) test is outdated and unrepresentative of real-world driving and current vehicles, and that lax testing procedures are allowing car-makers to manipulate the official tests to produce unrealistically low results
When the road load test procedures were drafted 30 years ago, no-one expected carmakers to adjust the brakes, pump up the tyres, and tape up all the cracks around the doors and windows to reduce the air and rolling resistance. These practices are now commonplace, with testing facilities being paid to optimise the results of the tests. There is no evidence that carmakers are breaking any formal rules - but they don’t need to - the current test procedures are so lax there is ample opportunity to massage the test results.