This would be one of the many ways to tax pollution, and a very poorly-thought out one. Engine size is a very small determining factor in tail-pipe emissions. A two-cycle moped probably produces much more pollutants than a V8 car in decent condition from the mid-'80s. You must consider that there are pollutants emitted per unit of fuel burned, and pollutants emitted per unit of work done. If you really wanted to be "fair," you would tax pollutants per unit of work done. But then the govt' would need to be checking in on everyone to see what they're doing, how much mass they are transporting, how many people, and how far. Papers please. NO THANKS. A reasonable, flat gas tax is the most economical and easiest thing to implement without impeding personal liberty.
Why would this even be considered? There is plenty of people out in the world with nice old cars and we shouldn't be punished for having them. It would depend on how much you drive to cause if you have a big motor car that you rarely drive and then you have a Prius that you drive all the time you would still be putting out more pollution in the Prius.
-The middle layer of the society will be equal to top. In our country about 15% of the middle layer of the population has a car with this volume of engine (3 l. And up). For example, tax for Toyota Land Cruiser 4.2 l. (1991, 16000$) will be the same like on new Toyota Land Cruiser 200 4.7 l. (2013, 70000$) - 1323$. But salary of these two men will be not the same.It can cause reduction of family income for not rich people.
-This law does not take into account also this fact - business trips. For example, some people can go abroad, for a long time for example 1 year, and they have to leave their car in their garages.These cars are not used by anybody, they don't pollute air, but when their owners will come back home, they will have to pay this tax although they don't use them at all.