And the confusion is added to by many government leaflets and websites saying CO2 but not whether NEDC or WLTP, However, I am afraid the which site is quite clear what they think and its bad news:-On-Track wrote: ↑Fri Mar 27, 2020 10:27 amThe confusion arises (including my own) with how emissions are declared for tax purposes. The NEDC equivalent figure for the Macan GTS IS 218 g/km. NEDC equivalent results from an agreed conversion of WLTP testing results. So NEDC equivalent figures are different from NEDC emissions values and WLTP values. If the NEDC equivalent value is that applied by HMRC then the tax increase will indeed be small. Here's hoping!Wing Commander wrote: ↑Thu Mar 26, 2020 7:56 pm£25?
That’s good, Steve! I was just going by what others have been saying on here about much more dramatic rises in the RFL...
"The change in CO2 measurements and car tax: NEDC to WLTP Increases in measurements of the CO2 a car emits are the result of changes to the official test. Instead of the previous unrealistic (and much-criticised) ‘New European Driving Cycle’ (NEDC), the more realistic ‘Worldwide-Harmonised Light vehicles Test Procedure’ (WLTP) is now used. NEDC CO2 values The NEDC test didn’t strain the car, and was open to a number of potential loopholes, including: The test is conducted with air conditioning, lights and heated windows off, thereby improving efficiency and reducing CO2. There is a tolerance for the testing to be carried out at 1.2mph below the required speed, meaning less fuel is used. Roof rails, extra lights and even the door mirror on the passenger side are allowed to be removed. This makes the car lighter and, therefore, more fuel-efficient. As the car was not strained, and manufacturers may have used these loopholes (and many more) to get better fuel economy, it meant that official CO2 values were kept artificially low. As first year tax is based on official CO2 rates, it means we have technically been paying more favourable rates than we should have done. WLTP CO2 values With support from our own ‘Come clean on fuel claims’ campaign, new generations of cars released after 1 September 2017 are now tested using the WLTP (Worldwide-Harmonised Light vehicles Test Procedure). All remaining new cars have had to go through the WLTP as of 1 September 2018. The WLTP closed all the known loopholes with the NEDC and is a much tougher cycle (although not as tough as Which? lab tests – see below). This means that fuel economy and CO2 figures from this test are higher and more realistic. Despite this new test being introduced in 2018 for all cars, the CO2 figures you see in car brochures and dealerships – and which are used to set first-year tax rates – are the WLTP CO2 figures converted to NEDC figures. That means we’ve continued to pay tax rates based on lower-than-realistic CO2 measurements. But that comes to an end this month. As of April 2020, CO2 values displayed in brochures and used to set first-year tax rates for new cars will be the direct WLTP results.
Read more: https://www.which.co.uk/news/2020/03/ca ... rom-april/ - Which?"
I am afraid Carwow and Autoexpress clearly come to the same conclusion. I have yet to find a site that provides the detail come to the opposite conclusion.