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What is the difference between Euro 5 and Euro 6 Engines?

European emission standards define the acceptable limits for exhaust emissions of new vehicles sold in the European Union.  As a member of the EU (for the time being at least), the United Kingdom is obliged to introduce Regulation (EC) No. 459/2012. This legislation requires vehicles to have an engine which meets certain environmental standards in order to reduce atmospheric pollutants such as particulates and nitrogen oxide.  The first standard was introduced in 1993 (Euro 1), we are now moving to Euro 6.     

Euro 5

Every van registered from October 2009 onwards has had to meet the current Euro 5 standard which states the maximum limits of NOx and CO2 that are permissible.  Euro 5 engines focused largely on carbon dioxide emissions.  

Euro 6

Euro 6 is primarily focused on reducing nitrogen oxide (NOx) emissions. Other gases are also lowered, such as CO2, carbon monoxide, sulphur dioxide, and diesel particulate matter emissions.  Different manufactures are tackling these standards in different ways. 

For example, DAF new range of CF and XF Trucks are all Euro 6 engines.

Ford, also have an all new Euro 6 engine for the Transit and Custom which replaces the old 2.2-litre diesel, bringing increased power, a wider spread of torque, and a 13 percent increase in fuel economy.

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