Euro 6 cars entering Clean Air Zones

Clean air heroes hidden among Euro 6 villains

Ensuring that it remains difficult to pick the saints from the sinners, the latest additions to the comprehensive EQUA Air Quality (Aq) Index show that Euro 6 vehicles continue to deliver drastically different results when tested in the real world.

The fuel penalty of 100kg

Weight costs fuel

2WD vs 4WD

Fuel Consumption Costs Diesel

A visualisation of cars tested for the EQUA Aq Index

A visualisation of cars tested for the EQUA Aq Index, split by Euro standard and fuel type, showing progress towards reduction of NOx emissions.

Snapshot #9: Class matters when it comes to MPG

We looked at our data on over 750 EU cars tested, to see how much of an influence vehicle class was on variance between the NEDC-derived official MPG and our cycle and found:

• Petrol sports cars come closest to their official figures

• The MPG gap is worse for small cars, whatever the fuel

• Overall the gap is almost always bigger for diesel engines.

Round up of average fuel economy for 2015

CO2 variance from official results by country

How PEMS works

A Portable Emissions Measurement System (PEMS) is used to measure vehicle emissions on the road rather than in the laboratory. This methodology, soon to be included as part of the official test for new cars, is used by Emissions Analytics to build a detailed database of real-world emissions. Data from over 1000 real-world vehicle tests is available via subscription. Contact us for further details

The first 1000 cars we have tested grouped by manufacturer

The impact of cold starts on NOx emissions

Euro 6 drives early NOx improvement

Average fuel economy is a reflection of the cars we drive

The ever-growing fuel gap

Official MPG growth (red) compared to real on-road growth (blue)

Growth in the MPG gap since EA started measuring real on-road performance