For the current UK Model Year 27 Hyundai Bayon, Hyundai publishes a combined WLTP economy of 47.9 mpg for the 1.0T 90PS with a six-speed manual and 48.7 mpg with the seven-speed dual-clutch transmission (7DCT). Those are laboratory comparison figures, not a promise of real-world consumption. All four listed versions have a 40-litre fuel tank and a first-year VED charge of £560 in Hyundai Motor UK’s October 2026 sheet. Insurance groups run from 13E to 15E, while CO₂ emissions are 131–134 g/km.
What fuel economy does the Hyundai Bayon achieve?
The current UK Bayon range uses one powertrain: a 1.0-litre T-GDi turbocharged petrol engine producing 90PS. Buyers choose either a six-speed manual gearbox (6MT) or a seven-speed dual-clutch transmission (7DCT). Hyundai’s Model Year 27 technical and pricing sheet, data correct in October 2026, gives the following WLTP results.
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| Trim and transmission | Combined WLTP | Low phase | Mid phase | High phase | Extra-high phase | CO₂ | Insurance group | First-year VED |
|---|---|---|---|---|---|---|---|---|
| Black Line 1.0T 90PS 6MT | 47.9 mpg (5.9 l/100km) | 38.7 mpg (7.3) | 51.4 mpg (5.5) | 56.5 mpg (5.0) | 44.8 mpg (6.3) | 133 g/km | 15E | £560 |
| Black Line 1.0T 90PS 7DCT | 48.7 mpg (5.8 l/100km) | 37.7 mpg (7.5) | 53.3 mpg (5.3) | 58.9 mpg (4.8) | 44.8 mpg (6.3) | 131 g/km | 13E | £560 |
| Tech Line 1.0T 90PS 6MT | 47.9 mpg (5.9 l/100km) | 38.2 mpg (7.4) | 50.4 mpg (5.6) | 56.5 mpg (5.0) | 44.8 mpg (6.3) | 134 g/km | 15E | £560 |
| Tech Line 1.0T 90PS 7DCT | 48.7 mpg (5.8 l/100km) | 37.2 mpg (7.6) | 53.3 mpg (5.3) | 58.9 mpg (4.8) | 44.8 mpg (6.3) | 132 g/km | 14E | £560 |
The combined result is identical between the two trims when the transmission is the same: 47.9 mpg for either manual and 48.7 mpg for either DCT. The phase results and CO₂ figures vary by trim, wheel and specification details. The Tech Line DCT figures above follow the sequence in Hyundai’s October 2026 sheet: low 37.2, mid 53.3, high 58.9 and extra-high 44.8 mpg.
How WLTP figures relate to everyday driving
WLTP is a standardized test intended to let buyers compare vehicles tested under the same procedure. Hyundai states that its fuel-consumption and CO₂ figures are for comparison only and may not match what an owner records on the road. Weather, traffic, driving style, vehicle load and accessories fitted after registration can all change consumption.
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A short urban commute, winter heating, repeated cold starts, hills, high speeds or a fully loaded car can produce a lower mpg figure than the combined value. A steady, lightly loaded run at moderate speed may do better. Because no independent real-world test or statistical owner survey is established here, there is no defensible single “actual mpg” number to substitute for the WLTP result.
What the four test phases mean
- Low phase: represents the slowest, most stop-start part of the test and is generally the least efficient.
- Mid phase: adds faster acceleration and roads than the low phase.
- High phase: represents higher-speed running under the test cycle.
- Extra-high phase: includes the fastest section and can reduce mpg compared with the high phase.
These phases are laboratory segments, not promises for a particular journey type. Treat them as diagnostic comparison figures rather than a city, motorway or mixed-driving guarantee.
Is the Bayon manual or automatic more economical?
On Hyundai’s published combined measure, the 7DCT is 48.7 mpg and the 6MT is 47.9 mpg. That is a difference of 0.8 mpg in the stated test. The DCT also records lower CO₂ in both trims: 131 g/km for Black Line and 132 g/km for Tech Line, versus 133 and 134 g/km for their manual equivalents.
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The result does not establish that every driver will use less petrol in the DCT. Real consumption depends on traffic, gradients, tyre pressures, payload and how each transmission is driven. The manual may suit drivers who prefer direct gear control or want its lower purchase price; the DCT may be preferable for frequent stop-start traffic. Use the published difference as a comparison point, then obtain quotes and consider your own driving pattern rather than assuming a guaranteed saving.
What does a Bayon cost to run?
Running cost has several parts: fuel, vehicle tax, insurance, servicing, tyres, maintenance and depreciation. The official October 2026 figures establish the first three elements only in part. They do not provide a personal annual fuel bill, current service prices or an insurance quote.
Fuel cost: calculate it from your own use
The Bayon has a 40-litre tank in both manual and DCT forms. Tank capacity is not a guaranteed range. To estimate your fuel budget, use this method:
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- Record your annual mileage in miles.
- Measure your own average mpg over several refills, preferably in the same car and season.
- Divide annual miles by measured mpg to estimate gallons used.
- Multiply gallons by the current petrol price where you buy fuel.
For a planning estimate before you have your own data, you can substitute 47.9 mpg for a manual or 48.7 mpg for a DCT, but label the result as a WLTP-based estimate. It will not account for your traffic, weather, load or driving style. Recalculate after the first few thousand miles using brim-to-brim fuel records or the car’s trip-computer data, recognizing that dashboard readings can also differ from pump measurements.
Vehicle tax
Hyundai’s October 2026 UK sheet lists a first-year VED charge of £560 for all four combinations. This is specifically the first-year amount shown for the Model Year 27 range; it is not a timeless annual tax figure. VED rules and rates can change, so check the current government rate for the registration date and exact specification when ordering.
Insurance
Insurance groups are 15E for both manual versions, 13E for the Black Line DCT and 14E for the Tech Line DCT. A group is a classification used by insurers, not a quotation. Your premium can change substantially with age, postcode, claims history, annual mileage, occupation, excess, security and the chosen insurer. Get a quote for the exact trim and transmission before comparing total ownership costs.
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Servicing, tyres and repairs
The cited Hyundai material does not establish a current service interval, servicing price schedule or typical tyre cost for every UK location. Those costs can vary with model year, dealer, mileage and tyre specification. Ask a Hyundai retailer for the interval and a written maintenance estimate for the exact vehicle identification or registration, and compare it with independent garage pricing where appropriate. Budget separately for tyres, brakes, MOT tests and unscheduled repairs rather than treating the WLTP figure as a complete ownership forecast.
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Hyundai’s Model Year 27 sheet lists these recommended on-road prices effective 1 October 2026:
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|---|---|---|
| Black Line 1.0T 90PS 6MT | £24,065 | £23,795 |
| Black Line 1.0T 90PS 7DCT | £25,315 | £25,045 |
| Tech Line 1.0T 90PS 6MT | £25,565 | £25,295 |
| Tech Line 1.0T 90PS 7DCT | £26,815 | £26,545 |
The December 2025 prices are historical launch figures; use the October 2026 prices for a current UK comparison. Finance interest, deposit, mileage limits, insurance and depreciation can outweigh a small difference in test-cycle fuel economy, so compare the complete payment and ownership picture.
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Which Bayon is likely to suit your driving?
Choose the 6MT when
- You prefer a conventional manual driving experience.
- Your priority is the lowest entry price within the same trim.
- You are comfortable managing clutch and gear changes in traffic.
Choose the 7DCT when
- You want two-pedal driving for congested urban routes.
- The 0.8-mpg higher combined WLTP figure is relevant to your comparison.
- You accept the higher purchase price shown in the current list.
Choose between Black Line and Tech Line
Within each transmission, the combined WLTP figure is the same for both trims. The published phase values, CO₂ and insurance groups differ slightly, so check the exact wheel and equipment specification. The Tech Line manual has 134 g/km and group 15E; the Tech Line DCT has 132 g/km and group 14E. Black Line records 133 g/km and 15E with the manual, and 131 g/km and 13E with the DCT.
How to improve your Bayon’s fuel consumption
- Check tyre pressures against the vehicle’s recommended settings, especially before long trips.
- Accelerate smoothly and anticipate traffic instead of braking hard and accelerating again.
- Use the highest suitable gear in the manual and avoid unnecessary high engine speed.
- On the DCT, allow the gearbox to select gears smoothly rather than repeatedly applying heavy throttle.
- Remove unused heavy items and roof equipment when they are not needed.
- Combine errands to reduce cold starts and short trips.
- Keep the car maintained and investigate warning lights or changes in engine behaviour promptly.
These practices can reduce fuel use, but none guarantees the combined WLTP number because road and weather conditions remain decisive.
Important model-year qualification
Hyundai has also announced an all-new Bayon for which final technical data and the consumption range are pending homologation. Do not apply the Model Year 27 figures in this article to that announced model. Confirm the engine, gearbox, CO₂ rating, tax and price on the final UK specification before placing an order.
Bottom line for UK buyers
The current UK 90PS Bayon is officially rated at 47.9 mpg combined with the manual and 48.7 mpg with the DCT. The difference is small and comes from a controlled WLTP test, so it should not be treated as proof that one transmission will always be cheaper to fuel. All four variants show £560 first-year VED, 40 litres of tank capacity and insurance groups from 13E to 15E. Build your decision around measured consumption, a current petrol price, an exact insurance quote and verified servicing costs for your location.
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