I’m reviewing a car fleet for a client – and I’m looking at a Jaguar XE 2.0d where the CO2 has increased from 99g under NEDC to a new figure of 128. I’ve checked it twice – and that’s the movement – 29g/km.

The company car tax for 2018/19 will now be based on 6% more of the list price (£33,395) which adds up to £801 extra in tax for a 40% taxpayer. Eight hundred and one pounds more – it’s the same car!

Begs a couple of questions:

Wasn’t “NEDC equivalent” supposed to be the same as NEDC? Id understood there was an algorithm (part of the correlation exercise) that when applied to a WLTP CO2 number would give, more or less, the same number as NEDC? Something doesn’t add up here?

And how did Jaguar get the XE under 100g/km when the WLTP based NEDC number is 29.2% higher?! That’s a huge difference surely?

One thing is for sure – if you have a Jaguar XE on order thinking the V5 will show 99g/km, you’re going to be mightily upset if it says 128g/km!