Hyundai Ioniq Hybrid MPG & CO2 emissions

The Ioniq is very efficient compared to a diesel hatchback, but it’s a shame the Toyota Prius manages lower emissions

MPG (comb) MPG (high) MPG (low) CO2
62.8mpg (WLTP) 72.4mpg (WLTP) 64.2mpg (WLTP) 103g/km (WLTP)

Hyundai Ioniq Hybrid MPG

The Ioniq Hybrid’s official figures of 84g/km and 78.5mpg shame most diesel rivals, although it does trail behind the Toyota Prius. Real-world economy should be impressive, too, and you’ll likely manage over 50mpg with ease.

There’s even the Ioniq’s ‘ECO-DAS’, or 'Eco Driving Assistant System', which helps keep fuel costs as low as possible by calculating the most efficient navigation route, taking traffic into consideration. It even encourages coasting by giving prior warning of changes in speed limits or road conditions.

CO2 emissions

Emissions of 84g/km are good by diesel car standards, but the Toyota Prius does undercut the Hyundai Ioniq Hybrid slightly with its 78g/km official figure (provided you have it on 15-inch wheels). It’s a shame that neither has free access to the London Congestion Charge Zone, as the electric and plug-in hybrid versions of the Ioniq do.

Battery range

We found it tricky to keep the Hyundai Ioniq Hybrid in electric-only mode, and while this is a relatively common trait of full hybrids (also known as 'self-charging' hybrids), Hyundai claims the Ioniq can be driven via the batteries and electric motor at speeds up to 75mph. We couldn’t keep it in pure electric mode above 40mph, and you’ll be lucky to see more than a mile or two before the petrol engine kicks in, however you’re driving.  

Battery warranty

Hyundai warranties the batteries in its electrified cars for eight years/125,000 miles – usefully better than Toyota’s hybrid battery warranty of five years/100,000 miles.