Against 344 other Hybrid cars rated 2024–2026, the S90 sits right on their 28 mpg average. Averaged over the years each was sold, the most economical engine since 1997, the 2L 4-cyl Hybrid (2018–2026), does 28.4 mpg and the thirstiest, the 2.9L 6-cyl (1997–1998), 18.5: $724 a year apart.
Every Volvo S90 engine, compared
Yearly cost assumes 12,000 miles at $3.20 a gallon.
| Engine | Combined | City / Highway | Years | Fuel per year |
|---|---|---|---|---|
| 2L 4-cyl Hybrid | 25.9 / 31.9 | 2018–2026 | $1,352 | |
| 2L 4-cyl | 23.3 / 32.9 | 2017–2023 | $1,438 | |
| 2.9L 6-cyl | 16 / 23.5 | 1997–1998 | $2,076 |
What that actually costs
| Measure | Value |
|---|---|
| Cost per mile (2026) | $0.114 |
| Fuel per year | $1,371 |
| Fuel over five years | $6,855 |
| Against other Hybrid cars, 2024–2026 | about the same |
| EPA's own estimate | $2,944 a year |
City or highway — who is this car for
The 2026 Volvo S90 gives up 10 mpg in town: 34 on the highway against 24 in the city, $471 a year if every mile were city driving.
| Measure | Value | Reading |
|---|---|---|
| City (2026) | 24 mpg | $1,600 a year if you only drive in town |
| Highway | 34 mpg | $1,129 a year if you mostly commute |
| Gap | +10 mpg (42%) | Wide — this car dislikes traffic |
How the S90 changed over the years
The S90 peaked in 2025 at 29 mpg (28 city, 31 highway) and was at its thirstiest in 1998 at 18 — 11 mpg apart, or $809 a year in fuel between buying one year and the other. The 2026 car does 28. The biggest single-year change came in 2025: 25 to 29 mpg.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2026 | 24 / 34 | 1 | $1,371 | |
| 2025 | 28 / 31 | 1 | $1,324 | |
| 2024 | 22 / 31 | 1 | $1,536 | |
| 2023 | 25.5 / 32.5 | 2 | $1,371 | |
| 2022 | 25.5 / 31 | 2 | $1,371 | |
| 2021 | 24.5 / 31.5 | 2 | $1,396 | |
| 2020 | 24.5 / 31 | 2 | $1,396 | |
| 2019 | 24.5 / 34 | 2 | $1,371 | |
| 2018 | 25 / 33.5 | 2 | $1,371 | |
| 2017 | 23 / 34 | 1 | $1,422 | |
| 1998 | 16 / 23 | 1 | $2,133 | |
| 1997 | 16 / 24 | 1 | $2,021 |
MPG is a number. Dollars per year is the answer.
- Fuel profile built from your actual mileage and local prices
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- Insurance and fuel folded into 5-year cost to own
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How we count
This page rests on 18 EPA ratings of the Volvo S90 — 3 engines across 1997–2026. The mileage is EPA's laboratory figure, unchanged; the yearly bill is ours, at 12,000 miles and $3.20 a gallon, against EPA's own estimate of $2,944. Full method.
Frequently asked questions
What mpg does the 2026 Volvo S90 get?
28 mpg combined, 24 city and 34 highway, per EPA. Across every year since 1997 the S90 has averaged 26.7 mpg.
Is the 2026 S90 more efficient than the 2025?
No: 28 against 29 mpg combined, about $47 a year more to run.
Which S90 year has the best gas mileage?
The 2025, at 29 mpg combined (28 city, 31 highway).
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