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 CO2 emissions

MPG (combined) MPG (high) MPG (low) CO2
63mpg 72mpg 66mpg 85g/km

Although the Hybrid is the least efficient member of the three-strong Ioniq family, it still does well by combustion-engined standards and doesn't require plugging in to charge its battery.

It's also the cheapest of the trio, which goes some way towards the explaining why it's the best-selling version by a big margin.

Hyundai Ioniq Hybrid MPG

The Ioniq Hybrid’s official figures of 85g/km CO2 emissions and 63mpg fuel economy shame most diesel rivals, although it does trail behind the Toyota Prius on emissions. Real-world economy should be impressive, too; you’ll likely manage over 50mpg with ease.

The Ioniq also has something called ‘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

The Ioniq's CO2 emissions of 85g/km are very good by diesel-car standards, but the Prius does undercut the Ioniq Hybrid slightly (provided you have the Toyota on 15-inch wheels).

Neither gets free access to the London Congestion Charge Zone any more – for that you'll need a pure-electric or plug-in hybrid car.