Could you provide your source of information? I have looked up a English explanations and they are fairly clear, in France initial registration varied from eg E200 to E3,000 in 2010 (given the state of the French economy E8,000 in 2014 is where it is at, but there is more to pay than just the E8,000, see below!) and there are zero annual taxes thereafter. There are registration taxes if you move registration district, and given the Gallic attitude to registration, I can imagine that these are obscure, complex and impenetrable! I gather that the French do have a lot of toll roads and the tolls are costly, on top of the high price of gas. Annual vehicle taxation ended in France in 2001 (the vignette) combined with a major programme of building high class toll roads. (This latter is on more than one site.) If you Google the subject, you can easily find information from those who have moved to France for example. The information I have found does confirm the high cost of a Company owned vehicle too (based on CO2 emissions), but I can't find a site that confirms an annual (recurring) tax for any private vehicle. Just curious.
Here are what seem to be the French registration taxes (if I am reading this right, you have to look up the 'class' (and age because different rules apply to older vehicles) of a vehicle based on its emissions to get a group number), the total 'gas guzzler' tax is only paid at first registration and appears to be the sum of five sections (and yes, there is the E8,000 for the worst polluters in 2014, only E2,600 in 2010)) of the tables and then if you move it gets re-calculated based on the charge rate of the new district compared to the previous district and whether or not there are discounts to be had (but you don't pay that whopping gas guzzler tax again, the rates are in the low E100s - and it is only if you move)- complex or what?):
Coût de la carte grise et taxe additionnelle, tarif carte grise