Automobiles

The Growing Gap Between Declared And Real Fuel Consumption of Passenger Cars

In 2014, data by the until then little known non-profit International Council on Clean Transportation (ICCT ) showed that German car manufacturer Volkswagen was manipulating it's fuel emissions data on a grand scale. VW isn't alone in having sold cars with so-called defeat devices, a software that manipulates exhaust emissions on a test stand.

However, it's not just the emissions data that's misleading. Data compiled by the ICCT also illustrates that there's a growing gap in how much fuel passenger cars actually consume under real world conditions and what manufacturers declare their car's intake is.

Description

This chart shows the gap between real fuel consumption of passenger cars in Europe and manufacturer's specifications (in %)

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Average fuel efficiency of new passenger cars in Japan FY 2013-2022
Sales volume of Tata passenger cars in India September 2024, by model
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Average fuel efficiency of new passenger cars sold in Japan FY 2013-2022
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Average age of passenger cars in Japan FY 2015-2024
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Private passenger cars in use per 100 households in Japan 2024, by prefecture
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