What is the real-world MPG of a Toyota iQ?
Owners report an average of 51.0 mpg across all Toyota iQ engines with data, about 82% of the official combined figure. The engine tables on this page give the figure for each engine and generation.
Toyota iQ MPG: what owners actually get
Owners report 51.0 mpg from a Toyota iQ, about 82% of the official figure. On its NEDC-tested engines that is 82%, about typical: the median NEDC-tested car in this 8,216-engine dataset returns 82%. The tables below give the figure for every engine and generation we hold. Add your own at the bottom and the averages get better for the next buyer.
51.0mpg
Real-world average, all engines
82%
of the official combined figure
35–65
Range reported by owners (mpg)
212
Owner submissions
Found a Toyota iQ for sale?
Paste the advert and we read it against the Toyota iQ’s known faults, its MOT history and the DVLA record, with the real-world 51.0 mpg from this page in the running-cost line, and tell you what the seller has not. Free, about a minute, no card.
Check a Toyota iQ advert (free) →Works with any listing: paste the text from AutoTrader, Gumtree, eBay, Facebook Marketplace or a dealer’s own site.
Toyota iQ
| Engine | Official (NEDC) | Official (WLTP) | Real MPG | % of official | Owners report |
|---|---|---|---|---|---|
| 1.0 VVT-i automatic | 58.9–65.7 | – | 45.7 | 73% | – |
| 1.33 VVT-i | 54.3 | – | 51.4 | 95% | – |
| 1.33 VVT-i automatic | 54.3 | – | 42.5 | 78% | – |
All figures in miles per gallon (UK). “Owners report” is the spread of individual submissions for that engine.
Add your Toyota iQ Real MPG
What does yours actually do? Read it off the trip computer over a full tank or work it out from litres and miles. No postcode, no sign-up. The more people add, the better the averages get, and this page stays free.
Toyota iQ fuel economy questions
Why is the Toyota iQ real MPG lower than the official figure?
Official figures come from a laboratory test cycle, not the road. Cold starts, short trips, hills, load, tyres and driving style all cost fuel the test does not see. A gap of 10 to 30 per cent is normal; a much bigger gap on one engine usually points at a fault, a heavy right foot, or a diesel that never gets warm.
Where did the Honest John Toyota iQ Real MPG page go?
The site closed in August 2026 and its Real MPG section went with it. This page is where the Toyota iQ figures now live: rebuilt from the archived dataset, with the official figures kept alongside, and reopened for new submissions.
Looking at a Toyota iQ right now? Check the advert before you go and see it.
Where the Toyota iQ figures come from
If you used the Honest John Real MPG section before the site closed in 2026, this is where the Toyota iQ figures now live. The owner-reported averages above were rebuilt from the archived dataset (archived page, 2025-04) alongside the official NEDC and WLTP figures and new submissions from CarAdCheck readers, and the section is open so they keep improving. Real-world figures also feed the running-cost estimate in our free advert check.
CarAdCheck is not affiliated with Honest John or Volkswagen Financial Services. How we rebuilt Real MPG.
Other Toyota models
Before you go and see it
Fuel economy is one line on the Toyota iQ running-cost sheet. These guides cover the checks that stop you buying the wrong one.
How to haggle for a used car: negotiate the price with what its records showHPI check vs carVertical: which is better, and our pick for a UK carMOT advisories explained: how to check them, and which ones should worry you
All buyer's guides →