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11h ago

Study Finds Plug-In Hybrids Fall Far Short of Fuel and CO2 Claims in Europe

Findings from 800,000 cars using onboard sensors prompt calls to tighten EU treatment of PHEVs ahead of 2035.

Un modèle hybride de la gamme Toyota exposé au salon de l'auto de Bruxelles (Photo d'illustration).
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Overview

  • Transport & Environment reports real-world fuel use averaging 5.9 liters per 100 km versus 1.5 l/100 km in WLTP lab tests.
  • Owners incur about €500 more in annual fuel costs than expected based on official consumption figures.
  • Data show PHEVs operate roughly 20% of the time on electric power versus manufacturer assumptions of about 80%.
  • Small battery capacities and underpowered electric drives lead the combustion engine to assist frequently, including during supposed electric operation.
  • Average CO2 emissions are only about 19–20% lower than equivalent petrol or diesel models, and some longer-range PHEVs emit more than mid-range versions; T&E urges revising 2025/2027 use factors and rejecting post‑2035 carbon‑neutral status.