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HyundaiIoniq plug-in hybrid (2017-2022)

Large
Plug-in hybrid (PHEV)
Used only

£9,995Typical price

Test score

where to buy or sell

The version of this car that we've reviewed might not be available to buy through all listed retailer links. For more options, see our guides on where to buy a car and how to sell a car.

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The Hyundai Ioniq is the first car to be sold in the UK as a hybrid, a plug-in hybrid or an all-electric vehicle. The Ioniq Plug-In Hybrid version, launched in 2017, aims to rival other part electric models such as the Toyota Prius Plug-In and VW Golf GTE. How does it behave on the road and does it make economic sense? Read our Hyundai Ioniq Plug-In Hybrid review to find out.

pros

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cons

What's included?

What is it?
What's it great at?
What's it like to drive?
How reliable are Hyundai's plug-in hybrid cars?
How comfortable and spacious is it?
How economical is it to run?
How safe is it?
Is there anything I should look out for?
Should I buy it?

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KEY TEST RESULTS
Comfort and practicality
Brand reliability 0-4 years

Jan 2023Last checked by Which?
Jul 2020First reviewed by Which?
Jan 2017Released

The overall Which? test score is made up of the following star ratings, all determined by our rigorous lab tests.

How we test cars

6 Jun 2025

Ease of driving

Overall
Visibility
Smoothness of power delivery
Driving stability
Cabin layout

How we test ease of driving

To find out how easy a car is to drive, we assess cars across a number of areas from visibility and handling to the layout of the cabin and how smoothly the engine delivers its power.

Performance

Overall
In-gear acceleration
Brakes

How we test performance

We test braking distances and whether the effectiveness of the brakes fade with repeat use. Performance is based on in-gear acceleration.

Comfort and practicality

Overall
Entry and exit
Seat comfort
Ride quality
Quietness
Seat space
Boot space (large cars, SUVs and MPVs)

How we test comfort and practicality

Comfort and practicality includes how easy it is, or not, to get in and out of the car and the maximum height of occupants. We also measure road, wind and engine noise and assess how well the car deals with bumps from large potholes to jittery surfaces like cobble stones.

Euro NCAP

How we test euro ncap

Any car that receives a rating of two stars or less from Euro NCAP is made a Don't Buy. Any car that receives three stars can't be a Best Buy. If a car has been available for more than four years and has not been tested by Euro NCAP, it cannot be a Best Buy.

Safety kit

How we test safety kit

We factor in the safety equipment that’s factory-fitted or optional, along with how well the car protects its occupants and pedestrians in the event of an accident. We also test how easy it is to fit a variety of child car seats.

Brand reliability 0-4 years

Overall
Electric car reliability
Full hybrid reliability
Plug-in hybrid reliability
Petrol reliability

How we test brand reliability 0-4 years

Our reliability ratings are based on the feedback from tens of thousands of UK motorists, as collected in our annual Which? car survey. We divide all reliability feedback into three age groups: cars aged up to four years, five to nine years, and 10 to 15 years.

Brand reliability 5-9 years

Overall
Diesel reliability

Brand reliability 10-15 years

Overall
Petrol reliability
Diesel reliability

General
Class	Large
Luxury	No
Convertible	No
Availability	Used only
Used price	£9,995 - £14,823
Fuel type	Plug-in hybrid (PHEV)
Tested fuel efficiency	91.1 to 114.4mpg
Length	4,470mm
Width (excluding wing mirrors)	1,820mm
Width (including wing mirrors)	2,050mm
Height	1,450mm
Driver max height
Second-row passenger max height
Boot space with seats up
Boot space with seats down
Number of seats	5
Folding rear seats	Yes
Isofix attachments	Yes
Turning circle	11.35 m
On sale date	01 July 2017
Lowest pence-per-mile cost	£12.38

Latest tested engine
Engine and trim name	Premium
Fuel type	Plug-in-Petrol-Hybrid
Capacity and power	1.6-litre (141hp)
Transmission	6-speed dual-clutch automatic
Driven wheels	Front-wheel-drive (FWD)
Fuel tank capacity	43 litres
Tested fuel economy: City / Out of town / Motorway (mpg)
Tested fuel efficiency (mi/kWh)
Tested fuel economy: Combined (mpg)
Cost per mile	14.9p per mile
Cost of filling tank	£58
Monthly fuel cost
Annual fuel cost
NOx level	Extremely Low (trace)
CO level	High
CO2 at tailpipe/tank-to-wheel (TTW) (g/km)	69
Tested electric-only range (miles)
Official Euro emission level	Euro 6d-Temp
Braked tow load (KG)	750kg
Unbraked tow load (KG)	750kg
Engine test date	03 April 2020
Test programme	2017

Engine two
Engine and trim name	Plug-in hybrid Premium
Fuel	Plug-in-Petrol-Hybrid
Capacity and power	1.6-litre (141hp)
Transmission	6-speed dual-clutch automatic
Driven wheels	Front-wheel-drive (FWD)
Fuel tank capacity	43 litres
Tested fuel economy: City / Out of town / Motorway
Tested fuel economy: combined mpg
Tested fuel efficiency (mi/kWh)
Cost per mile	12.38p per mile
Cost of filling tank	£58
Monthly fuel cost
Annual fuel cost
NOx level	Very low
CO level	Extremely High
CO2 at tailpipe/tank-to-wheel (TTW) (g/km)	54
Official Euro emission level	Euro 6b
Engine test date	20 November 2017
Car test programme	2017

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£10,184Typical price

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Suggested searches

HyundaiIoniq plug-in hybrid (2017-2022)

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pros

cons

What's included?

How we test cars

Ease of driving

Performance

Comfort and practicality

Euro NCAP

Safety kit

Brand reliability 0-4 years

Brand reliability 5-9 years

Brand reliability 10-15 years

How this product's score compares with other new and used cars we've tested

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Toyota

Volkswagen

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HyundaiIoniq plug-in hybrid (2017-2022)

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Test results

Specifications

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