The impact of the tougher new emissions testing system that kicks in next month can be highlighted this week – for good and bad.
A major analysis warns that several manufacturers face being hit hard as their vehicles return much higher emission data under the new WLTP regime.
The data experts JATO are warning that the chasm between old and new figures will hit many marques harder than they expected.
The organisation says that the gap between new WLTP and old NEDC is much wider than anticipated.
Yet, at the same time, the likes of Toyota here are saying that their hybrids are faring particularly well, with 2019-arrival models registering 10pc lower than with the old (NEDC) test.
Just to recap: The Worldwide Harmonised Light Vehicle Test Procedure (WLTP) is replacing the New European Driving Cycle (NEDC).
The WLTP test better reflects real-word conditions.
After September 1 only new cars that have been WLTP-tested can be sold. But a special device, called Co2mpass, has been devised to put the WLTP test results in current context (called NEDC2).
So effectively it is the NEDC2 data that comes into force on September 1.
And they are the C02 figures manufactures will report until full WLTP applies in 2020.
At that stage, C02 reported figures are expected to be significantly higher than they were under NEDC.
Last week we revealed that BMW owners face a minimal, yet €600, hike in some prices under the new system (the 520d was given as an example).
This week, Toyota are claiming their emphasis on hybrid has contributed to favourable results.
According to marketing director Michael Gaynor they are still finalising their NEDC2 figures for some hybrids.
“But I can confirm that hybrid performs very well under NEDC2,” he said.
“The C-HR hybrid (crossover) actually shows a 1pc decrease under NEDC2, with some new hybrids launching in 2019 coming in 10pc less.”
On a more general note, JATO are saying the average gap between old and new tests is 18.3g/km higher in luxury vehicles.
That could have big implications for price and road tax if the new data shunts them into a higher tax band, given they are usually already in fairly high brackets.
According to the JATO data, small and city cars are faring best, with an average increase of 6.6g/km expected.
However, there is an average 16.7g/km increase predicted in medium-sized SUVs, for example.
The danger, as already illustrated, is not allowing for the fact that some of these cars can fare much better than others of their sector.
The JATO revelation followed analysis of a sample of the cars that have been re-homologated.
As previously reported, the European Commission has recommended that consumers should not be penalised under the new measuring system.