I've been assured by my company accountant that the Evo VI will attract tax at the 25% rate. I queried this most strongly when I considering ordering it. If you go here:
http://www.inlandrevenue.gov.uk/news/budget/p523_2000.pdf then you can get the current details. Alternatively, for more comprehensive information go here:
http://www.inlandrevenue.gov.uk/cars
Currently, the new tax rules simply state that if a car does not have any emissions figures, for whatever reason, then the tax rate will be based on engine size alone. I've been constantly checking both online databases that are relevant to this, and will be very surprised if official figures for the Evo VI are ever generated. These databases can be found here:
http://www.vca.gov.uk/frames/index.htm and here:
http://www.smmt.co.uk/co2/co2.asp
As my car is an official Ralliart/Mitsubishi UK import, then I suspect that this is all I need to worry about. If your car is a grey import, then I am pretty sure that the tax man will still only be able to charge tax at 25%. As far as the price on which the tax is chargeable, this will be down to whatever value is put on the car by your accountants when they create your P11D. Usually, they will use the manufacturers list price for the car (assuming there is one), but if not, they will enter the actual purchase price when new (in the case of grey imports). The tax man can challenge this, but if you have documentary proof that this is what the vehicle cost when first registered, then I believe they will allow this price. At worst, the tax man may insist of using the list price of the nearest equivalent official car e.g. the GSR at £30,995.
If you've got any doubts about tax and grey imports, I suggest you talk to an accountant, and get him to look into it.
Regards,
Andy.