Lowest CO2 Emissions questions answered
Which car ranks first in the Lowest CO2 Emissions ranking?
2025 Mercedes-Benz E-Class E 300 e ranks first in the current CarsbySpec dataset at 16 g/km. The linked profile shows the specification used.
What are the top cars in the Lowest CO2 Emissions ranking?
The current top five are 1. 2025 Mercedes-Benz E-Class E 300 e at 16 g/km; 2. 2024 Li Auto L7 Ultra at 18 g/km; 3. 2025 Suzuki Across 2.5 PHEV E-Four GLX at 22 g/km; 4. 2024 Suzuki Across 2.5 PHEV E-Four at 22 g/km; 5. 2024 Mercedes-Benz S-Class S 580 e 4MATIC at 23 g/km.
How is the Lowest CO2 Emissions ranking calculated?
Cars are ordered by co2 emissions using the structured value shown on each linked profile. One best-matching specification is retained per model year, missing values are excluded, and ties remain visible rather than being filled with estimates.
Does this ranking prove which car is best overall?
No. It ranks one recorded specification only. Price, comfort, reliability, charging, efficiency, safety and driving behaviour require separate comparisons and, where relevant, a road test.