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 sold in Japan FY 2013-2022
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Average fuel efficiency of new passenger cars in Japan FY 2012-2021
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Private passenger cars in use per 100 households in Japan 2024, by prefecture
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Number of registered passenger cars in Turkey 2023, by region
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Market share of imported passenger cars in Turkey 2010-2023
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Number of battery-electric passenger cars in traffic in Finland 2023, by brand

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