KIA Optima 1.7 CRDi 2 Tech 134hp ISG

Overall Green Car Rating The Green Car Rating expresses a vehicle's lifecycle environmental impact as a score out of 100 ranging from 0 for the greenest vehicles to 100 for the most polluting. MORE INFO

• Climate Change Rating The Climate Change Rating expresses a vehicle's life cycle CO2 emissions impact as a score out of 100 ranging from 0 for the lowest impact vehicles to 100 for the highest impact. 50
• Air Quality Rating The Air Quality Rating expresses a vehicle's life cycle air quality impact (which cover the "regulated emissions": CO, Nox, NMOG, SO and particulates) as a score out of 100 ranging from 0 for the least polluting to 100 for the most polluting. 19
• Official CO2 emissions The official CO2 emissions are tailpipe emissions only as measured by the official test over the New European Driving Cycle (NEDC). 128 g/km
• Official CO2 band The official CO2 tax band is based on the official CO2 emissions and determines the amount of Vehichle Excise Duty (VED) or car tax paid each year. D
• Official fuel economy The official 'combined' fuel economy (as quoted in miles-per-gallon and litres/100km) is measured using an official test over the New European Driving Cycle (NEDC), which aims to represent a combination of urban (mainly town driving) and extra-urban (motorway / rural) driving. 58 mpg
• Emissions standard The European vehicle emissions standard originates from an EU directive to reduce the amount of "regulated emissions" affecting air quality. While all new cars must currently conform to Euro 5, some cars are already Euro 6 compliant which will be mandatory from 2015. V

Life cycle CO2 Life cycle CO2 shows the amount of CO2 emissions in g/km over the life time of a vehicle (assuming 150,000 km). The life cycle emissions include tailpipe emissions (official test), and emissions generated during fuel and vehicle production (estimated). more» 

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This diesel KIA Optima has fuel economy of 58 MPG, tail-pipe CO2 emissions of 128g/km (Tax Band D) and overall Green Car Rating of 37.