White paper

Real-world usage of plug-in hybrid vehicles in Europe: A 2022 update on fuel consumption, electric driving, and CO2 emissions

The potential of plug-in hybrid electric vehicles (PHEVs) to reduce fuel consumption and global greenhouse gas emissions depends on how much they are effectively driven on electricity. Earlier studies on the real-world usage of PHEVs certified under the New European Driving Cycle (NEDC) have shown that those vehicle models are driven much less on electricity than the type-approval procedure assumes. This study presents an analysis of the average real-world fuel consumption and electric driving share of about 9,000 private and company car PHEVs in Europe, with an emphasis on Worldwide Harmonized Light Vehicles Test Procedure (WLTP) type-approved vehicle models.

The analysis finds:

The real-world fuel consumption of PHEVs in Europe is on average three to five times higher than WLTP type-approval values. The average real-world fuel consumption of PHEVs in Europe is 4.0–4.4 L/100 km for private vehicles and 7.6–8.4 L/100 km for company cars compared to an average of 1.6–1.7 L/100 km in WLTP type approval. These values correspond to tailpipe emissions of 90–105 g CO2/km for private vehicles and 175–195 g CO2/km for company cars compared to only 37–39 g CO2/km in WLTP type approval.

The deviation between real-world and type-approval fuel consumption is growing. For PHEVs in general, the real-world fuel consumption has been growing by a few percent on average since 2012 when normalized for changing vehicle properties such as equivalent all-electric ranges or mass. This long-term growth corresponds to an average increase of 0.1–0.2 L/100 km with every build year. The deviation from type-approval values is higher for WLTP certified cars than for NEDC vehicles as newer WLTP certified cars show slightly higher average real-world fuel consumption.

The average real-world electric driving share is about 45%–49% for private cars and about 11%–15% for company cars. In contrast, the official WLTP type-approval procedure assumes the share of driving in the mostly, but not fully, electric charge-depleting mode at around 70%–85%. The low electric driving share is one of the main reasons for the high deviation between type approval and real-world fuel consumption.

Based on the large-scale empirical evidence, the study presents how the WLTP type-approval assumption on the share of driving in charge-depleting mode (Utility Factor) can be adjusted to better reflect average real-world usage of PHEVs.

Fact sheets in English and German.
Data table of PHEV real-world fuel consumption and electric driving share.

Vehicle testing
Europe
Privacy Overview
International Council on Clean Transportation

This website uses cookies to enable some basic functionality and also to help us understand how visitors use the site, so that we can improve it.

Essential Cookies

Essential cookies provide basic core functionality, such as saving user preferences. You can disable these cookies in your browser settings.

Analytics

We use Google Analytics to collect anonymous information about how visitors interact with this website and the information we provide here, so that we can improve both over the long run. For more on how we use this information please see our privacy policy.