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For me the science and politics is flawed and based on bad data. The VW scandal was just that everybody was up in arms, but in reality the test is flawed.
The thing for me that is annoying is that car manufacturers are "revising" to the test, here is the current test for both consumption and emissions look how unrealistic and short it is....
Urban cycle
The urban test cycle is carried out in a laboratory at an ambient temperature of 20°C to 30°C on a rolling road from a cold start where the engine has not run for several hours. The cycle consists of a series of accelerations, steady speeds, decelerations and idling. The maximum speed is 31 mph (50 km/h). The average speed 12 mph (19 km/h) and the distance covered is 2.5 miles (4 km). The cycle is shown as Part One in the diagram below.
Extra-urban cycle
The extra-urban cycle is a cycle that is intended to represent the use of the vehicle on roads that are external to the urban environment. The cycle is conducted immediately following the urban cycle and consists of roughly half steady-speed driving with the remainder being accelerations, decelerations, and some idling. The maximum speed is 75 mph (120 km/h). The average speed is 39 mph (63 km/h) and the distance covered is 4.3 miles (7 km). The cycle is shown as Part Two in the diagram below.
Combined Fuel Consumption Figure
The combined figure presented is for the urban and the extra-urban cycle together. It is therefore an average of the two parts of the test, weighted by the distances covered in each part.
IMPORTANT NOTE
The fuel consumption figures quoted in this guide are obtained under specific test conditions, and therefore may not necessarily be achieved under ‘real life’ driving conditions. A range of factors may influence actual fuel consumption - for example, driving style and behaviour, as well as the environment and conditions under which the vehicle is operated. Furthermore, since several different specifications (variants or versions) of a given model may be grouped together in the list, the figures used in this guide should be treated as indicative only.
A definitive figure for a given specification of vehicle will be available at the point of sale.
The new engines both petrol and diesel are heavily turbo dependant and this test probably doesn't get to spin the turbo up much at all. As soon as you in the real world and the turbo is doing its job the fuel economy goes down considerably.
According to this site looking at
EQUA Air Quality Index | EQUA INDEX | Independent real world driving data
Looking at the Audi A6 Euro 6 engines non of them meet the spec in the real world.
Only BMWs most recent 5 series meets it, the previous model is in a similar boat to the A6.
Save the planet by getting some realistic tests.... |
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