2026 Genesis G90 — Full Specifications
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The 2026 Genesis G90 is a saloon/sedan offered with 2 engines (3.5L 6-cyl turbo, 3.5L 6-cyl twin-charged). Its most fuel-efficient configuration returns around 25 mpg (UK) / 21 mpg (US EPA) combined, with 24–25 mpg (UK) across all configurations. A hybrid version is also listed by EPA (3.5L 6-cyl twin-charged), returning around 24 mpg (UK) combined. Owners often keep a Genesis G90 workshop manual to hand for servicing and repairs.
Compared with the 2025 Genesis G90: Fuel economy is essentially unchanged at around 25 mpg (UK) combined. The engine line-up listed by EPA is unchanged.
Full Specifications
| Engine (most efficient) | 3.5L 6-cyl turbo |
|---|---|
| Engine options | 3.5L 6-cyl turbo · 3.5L 6-cyl twin-charged |
| Transmission (most efficient) | Automatic (S8) |
| Fuel Type | Premium Gasoline |
| Powertrain | Conventional |
| Drive | All-Wheel Drive |
| Body Style | Saloon/Sedan |
| Passenger Volume (EPA) | 109 cu ft (3,087 L) |
| Luggage Volume (EPA) | 12 cu ft (340 L) |
| Fuel Economy (UK) | 25 combined / 22 urban / 31 extra-urban mpg |
| Fuel Economy (US EPA) | 21 combined / 18 city / 26 highway mpg |
| CO₂ Emissions | 265 g/km |
| EPA Greenhouse Gas Score | 4 / 10 (10 = lowest emissions) |
| EPA Est. Annual Fuel Cost | $3,900 (15,000 mi/yr, US prices) |
Engine & Transmission Options
EPA lists 2 configurations for the 2026 Genesis G90 across 2 engines (3.5L 6-cyl turbo, 3.5L 6-cyl twin-charged). Combined fuel economy ranges from 20 to 21 mpg (US), or 24 to 25 mpg (UK), depending on engine, transmission and drive. The headline figures at the top of this page describe the most fuel-efficient configuration.
| Engine | Transmission | Drive | MPG (UK) | MPG (US) | CO₂ g/km | Fuel cost / yr |
|---|---|---|---|---|---|---|
| 3.5L 6-cyl turbo | Automatic (S8) | All-Wheel Drive | 25 | 21 (18/26) | 265 | $3,900 |
| 3.5L 6-cyl twin-charged (Hybrid) | Automatic (S8) | All-Wheel Drive | 24 | 20 (17/24) | 274 | $4,100 |
MPG (US) shows combined, with city/highway in brackets. Highlighted row = the configuration used for the headline figures. Source: US EPA fueleconomy.gov.
EPA measures interior passenger volume at 109 cubic feet (about 3,087 litres) and luggage volume at 12 cubic feet (about 340 litres). These are US EPA interior-volume figures; they are measured differently from the boot capacity numbers UK manufacturers quote.
Owner Essentials for the 2026 Genesis G90
Running Costs: 2026 Genesis G90
Covering around 8,000 miles a year in a 2026 Genesis G90 at 25 mpg combined, expect roughly 1,455 litres of fuel annually — multiply by your local price per litre for a cost estimate. For US owners, the EPA estimates about $3,900 a year in fuel for the most efficient configuration (15,000 miles, national average prices). Work out exact fuel costs with the fuel cost calculator on 247Calculators.
Convert between MPG and L/100km with the unit converters on 247QuickTools. Not sure what tyre size fits? 247TyreCheck explains tyre sizing.
Only need this car occasionally? See our buy vs rent comparison.
2026 Genesis G90 Safety Ratings (NHTSA)
No NHTSA crash-test rating is on record for this model year. The NHTSA rates only a subset of vehicles each year; you can browse every rated vehicle on our NHTSA Safety Ratings hub.
How It Compares
Genesis models in our database average about 27 mpg (UK) combined on their most efficient configuration; the 2026 Genesis G90's 25 mpg is 2 mpg below that make average. Its 265 g/km CO₂ figure is 16 g/km higher than the 249 g/km Genesis average.
Of the 10 Genesis G90 model years we cover, the 2026 is the most economical on its best configuration (25 mpg UK combined). See every Genesis G90 year side by side.
Last updated: · Data: US EPA (fueleconomy.gov) and NHTSA safety ratings 18 July 2026; NHTSA recalls and complaints 6 October 2026; Wikidata & curated EU catalogue 18 July 2026; European generation and engine data from Wikipedia 7 October 2026
Vehicle data sourced from manufacturer specifications. Always verify with your vehicle handbook or a qualified mechanic. This is a reference tool, not professional advice.
Recommended Accessories for the 2026 Genesis G90
Frequently Asked Questions
What engine does the 2026 Genesis G90 have?
EPA lists 2 engines for the 2026 Genesis G90: 3.5L 6-cyl turbo, 3.5L 6-cyl twin-charged. The most fuel-efficient configuration pairs the 3.5L 6-cyl turbo with a automatic (s8).
What is the fuel economy of the 2026 Genesis G90?
The most efficient configuration returns around 25 mpg (UK) combined, or 21 mpg on the US EPA cycle. Across all configurations the UK combined figure runs from 24 to 25 mpg. The hybrid version returns around 24 mpg (UK) combined.
How much does the 2026 Genesis G90 cost to fuel per year?
The US EPA estimates about $3,900 a year in fuel for the most efficient configuration, based on 15,000 miles of mixed driving and national average fuel prices. Your own cost will depend on mileage and local prices.
How much interior and luggage space does the 2026 Genesis G90 have?
EPA measures interior passenger volume at 109 cubic feet (about 3,087 litres) and luggage volume at 12 cubic feet (about 340 litres). These are US EPA interior-volume figures, which are measured differently from the UK boot-capacity numbers manufacturers quote.