Co2 Testing Protocols?

[Grandpappy]

I've just become aware of "fuel economy and CO2 testing protocols" that 'come-in' soon!
I'm afraid I'm in the dark-this data was relayed by DTCwordfan in relation to a car I was looking at and I would like to know more; can anyone enlighten me,please?
Many thanks.

[Buenchico]

WLTP only affects new vehicles:
https://www.parkers.co.uk/car-advice/fuel-economy-test-changes-what-you-need-to-know-about-wltp/

[IJKLM]

Where to start?

Current vehicles are tested under the New European Driving Cycle (NEDC).
From 2019 the EC moves across to the World Light Vehicle Test protocol (WLTP).

WLTP is massively complex. In theory, it is supposed to represent a driving cycle that is more reprentative of 'normal' driving. In reality, the test scheme is not perfectly clear. We don't know how certain very detailed aspects of the WLTP will work out. Such as, for example, different size of exhaust pipe, or different wheel designs, or different tyre suppliers.

Each individual variant of a vehicle will have its own rating under WLTP. So not just the sport variant, but the sport variant with sporty wheels and the sport variant with sporty wheels and Pirelli tyres will have a different raring from the sport variant with sporty wheels and Michelin tyres.

Within the industry, it is a huge deal.

For consumers, a bit less so.

Except that initial purchase price and ongoing taxation rates will be affected by the WLTP rating.

Massively complex change, but exciting, if you are in the business....

Essentially it drives vehicle makers to be as energy-efficient as possible

[Grandpappy]

Thanks for the data IJKLM-I am now an older & wiser man!
I did check the goverments take on this(?):-"During the transitionary period Sep-'17 to Sep-'18 , there will be cars on the database that may have been tested under NEDC or WLTP . It is very difficult to compare two similar cars tested underdifferent regimes ,so to avoid confusion and to ensure like-for-like comparisons can be made ,the initial search results will not show WLTP test results. Instead, where a car was tested under WLTP,the "NEDC equivalent" data,i.e. figures that would have been achieved had the car been tested under the outgoing NEDC standard, will be shown instead" - is all that clear? and if not ,then it goes on to state-"Note that where NEDC equivalent figures are used in this way , VCA will provide a link to a separate area of the site displaying the original WLTP test results for that car". I MUST say this (*** HELL)!!!
Can you imagine have a chat down the boozer with the 'knob-head' who drafted that?
Right, where can I buy a bike?
Cheers