The Kia EV4 has received a five-star Sustainability Rating from Green NCAP, achieving an overall score of 90% in the independent organisation's environmental assessment. The result places the electric crossover among the strongest performers in the seven-vehicle group covered by Green NCAP's September 2026 assessment round.
The evaluation covered the front-wheel-drive Kia EV4 Earth equipped with an 81.4 kWh usable battery and an electric motor producing 150 kW and 283 Nm of torque. Green NCAP assessed the vehicle's energy efficiency, greenhouse gas emissions, air quality impact and broader life-cycle performance, alongside practical factors such as winter driving, cabin heating and charging efficiency.
The Kia EV4 scored 9.5 out of 10 for Greenhouse Gases, 8.9 out of 10 for Energy Efficiency and 8.8 out of 10 for Clean Air. Green NCAP highlighted the vehicle's low electricity consumption and European production as important contributors to its overall environmental performance.
Kia EV4 Green NCAP Sustainability Rating Explained
Green NCAP evaluates vehicles beyond their official laboratory consumption figures. Its assessment combines laboratory measurements, road testing and life-cycle calculations to examine environmental impacts associated with vehicle operation, energy supply and production.
The tested Kia EV4's 90% overall score reflects its strong performance across the three principal assessment categories. Its 9.5 out of 10 Greenhouse Gases score was the strongest of the three, while the Energy Efficiency score of 8.9 out of 10 demonstrated that the large-battery electric crossover could maintain relatively low electricity consumption across different test conditions.
The Clean Air score was 8.8 out of 10. Although the EV4 recorded no tailpipe emissions during operation, Green NCAP also considered non-exhaust pollutants, including tyre and brake wear, as well as emissions associated with vehicle production and electricity supply.
Kia EV4 Energy Consumption in Real-World Tests
One of the main findings was the EV4's electricity consumption during different driving conditions. The vehicle recorded 13.9 kWh/100 km during Green NCAP's summer on-road test, beating its declared WLTP combined consumption figure of 14.6 kWh/100 km.
However, energy demand increased during highway driving and cold-weather testing. The results highlight how speed, ambient temperature and cabin heating requirements can influence the efficiency and driving range of an electric vehicle.
| Test Condition | Electricity Consumption | Tailpipe Greenhouse Gas Emissions |
|---|---|---|
| Summer on-road test | 13.9 kWh/100 km | 0 g CO2-equivalent/km |
| Declared WLTP combined figure | 14.6 kWh/100 km | 0 g CO2-equivalent/km |
| Warm-weather laboratory test | 15.9 kWh/100 km | 0 g CO2-equivalent/km |
| Highway test cycle | 24.0 kWh/100 km | 0 g CO2-equivalent/km |
| Winter test with warm start | 22.0 kWh/100 km | 0 g CO2-equivalent/km |
| Winter test with cold start at -7°C | 26.9 kWh/100 km | 0 g CO2-equivalent/km |
These figures refer to different test procedures and environmental conditions, so they should not be treated as directly interchangeable. The WLTP figure is the declared laboratory-based consumption value, while the on-road result represents the conditions encountered during Green NCAP's summer drive.
Green NCAP also noted that the energy consumption figure displayed by the vehicle provides a useful indication of battery energy usage. However, it does not include all the electricity drawn from the grid during charging because charging losses increase the energy required from an external power source.
Winter Performance and Cabin Heating
Cold-weather performance was one area where the Kia EV4 showed room for improvement. During testing at -7°C, Green NCAP rated its cabin heating performance poorly because the interior took longer than expected to reach the target temperatures.
The assessment recorded heating times of 506 seconds for the front head area and 780 seconds for the rear head area. The footwell in the front cabin took 918 seconds to reach the target temperature. The rear footwell, however, warmed up considerably faster, while the vehicle's cabin insulation received a good assessment.
Green NCAP found that pre-warming the EV4 while it remains connected to the electricity supply can substantially improve its available driving range in cold weather. Its estimates indicate a potential range benefit of up to 135 km during urban trips and 76 km on mixed journeys when the vehicle is pre-warmed.
The tested model uses a PTC heater, while a heat pump is available as an option. These findings underline the importance of cabin and battery temperature management when operating electric vehicles in colder climates.
European Production Helps Reduce Life-Cycle Emissions
The Kia EV4's manufacturing location also contributed to its sustainability assessment. The tested vehicle is produced in Slovakia, allowing Green NCAP to apply European production assumptions and regional electricity-mix data in its life-cycle calculations.
Producing an electric vehicle and its battery creates emissions before the vehicle reaches the road. The EV4's relatively large 81.4 kWh usable battery therefore represents a significant part of its initial environmental footprint. Its efficient operation and the electricity mix associated with European production and use help reduce the estimated overall impact.
Green NCAP calculated the EV4's life-cycle greenhouse gas emissions at approximately 118.9 g CO2-equivalent per kilometre. This is a whole-life-cycle estimate rather than a tailpipe emissions figure. The vehicle produces no tailpipe greenhouse gas emissions during driving, but the broader calculation also accounts for emissions associated with production and energy supply.
Tyre Wear, Braking and Clean Air Performance
Despite its strong overall rating, the EV4 did not perform equally well in every environmental category. Green NCAP awarded it 6.3 out of 10 for non-exhaust emissions within the Clean Air assessment.
The organisation identified tyre wear as a weakness, citing the vehicle's mass of 1,853 kg and its aggressive accelerator-pedal response, which could increase tyre slip during everyday driving. The EV4's extensive use of regenerative braking helps reduce reliance on conventional friction braking, limiting brake wear and associated particulate emissions.
The result illustrates an important consideration for electric vehicle owners. Although battery-electric cars eliminate exhaust emissions during driving, tyre wear, brake particles and emissions associated with electricity generation and manufacturing remain relevant to their overall environmental impact.
Charging Efficiency and Bidirectional Power
Green NCAP rated the EV4's charging capabilities as adequate. The vehicle supports AC charging at up to 11 kW, while its fast DC charging performance was also rated adequate in the assessment.
The tested version can be equipped with an optional bidirectional charging function delivering up to 3.6 kW to an external electrical device through Vehicle-to-Load (V2L). Green NCAP also states that the vehicle is prepared for Vehicle-to-Grid (V2G) operation, although the availability and compatibility of such functions depend on the relevant equipment and charging infrastructure.
These features add flexibility to the EV4's electric powertrain, but the assessment also shows that charging efficiency, winter usability and non-exhaust emissions remain important considerations alongside headline driving range and battery capacity.
AkulRide Verdict
The Kia EV4's five-star Green NCAP Sustainability Rating and 90% overall score demonstrate that a family-oriented electric crossover with a large battery can deliver strong environmental performance. Its 13.9 kWh/100 km summer on-road consumption result, 8.9 out of 10 Energy Efficiency score and 9.5 out of 10 Greenhouse Gases score are key strengths.
European production and low operating emissions further contribute to the EV4's estimated life-cycle performance. However, the assessment also identifies practical compromises, particularly slow cabin heating in sub-zero conditions and weaker tyre-wear performance. Pre-warming the vehicle while connected to the grid can help improve cold-weather range.
Overall, the Kia EV4 presents a strong environmental case for buyers considering an electric family car. Its Green NCAP result provides useful evidence about efficiency and life-cycle impact, while also showing why real-world conditions and manufacturing emissions matter when evaluating the sustainability of an electric vehicle.
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