Vehicle comparison
BMW iX vs BMW X5
Side-by-side fuel and ownership cost comparison. Estimates use 12,000 mi/year at average US gas and electricity prices.
- Updated for 2026
- EPA-style MPG
- US avg fuel prices
- EV rates vary by state
- Transparent assumptions
Lowest running cost
BMW iX wins on fuel cost
At 12,000 miles per year, the BMW iX costs about $738 per year, roughly $1401 less than the BMW X5. Over 5 years, that's about $7003 in fuel savings.
Spec & cost comparison
MPG/MPGe figures are estimates based on typical recent model years.
| Spec | BMW iX | BMW X5 |
|---|---|---|
| Type | EV | SUV |
| Fuel | Electric | Premium gas |
| City MPG/MPGe | 86 | 21 |
| Highway MPG/MPGe | 87 | 26 |
| Combined MPG/MPGe | 86 | 23 |
| Tank / Battery | 105 kWh | 22 gal |
| Energy cost | $0.16/kWh | $4.10/gal |
| Cost per mile | $0.062 | $0.178 |
Annual cost at 8k / 12k / 15k miles
Estimated yearly fuel spend at common US mileage levels.
| Miles/year | BMW iX | BMW X5 | Difference |
|---|---|---|---|
| 8,000 | $492/yr · $41/mo | $1426/yr · $119/mo | $934 (BMW iX) |
| 12,000 | $738/yr · $62/mo | $2139/yr · $178/mo | $1401 (BMW iX) |
| 15,000 | $923/yr · $77/mo | $2674/yr · $223/mo | $1751 (BMW iX) |
Estimates only. Real costs depend on driving style, terrain, local gas/electricity prices and weather.
Which one is best for…
Best for commuting
BMW iX
Highest combined MPG/MPGe and lowest cost per mile means cheaper daily driving.
See BMW iXBest for road trips
BMW X5
Better highway efficiency, larger tank/battery and longer range between stops.
See BMW X5Best for families
BMW X5
SUVs, minivans and three-row vehicles win on space and child-seat flexibility.
See BMW X5Best for lowest running cost
BMW iX
Cheaper energy use and lower cost per mile at every common mileage tier.
See BMW iXHow we compare these vehicles
- Annual mileage
- Modeled at 12,000 mi/yr unless a scenario specifies otherwise.
- Cost per mile
- $/gal ÷ MPG, or $/kWh ÷ (MPGe ÷ 33.7) for EVs.
- EV vs gas
- Compared at average US gas and residential electricity prices — fast-charging can be 2–3× higher.
- Maintenance
- Fuel cost only — EVs typically save another $400–$1,000/yr in service and brake wear.
Sources & assumptions
- EPA fuel economy data — City / highway / combined MPG and MPGe baselines.
- U.S. Department of Energy (fueleconomy.gov) — Vehicle efficiency and EV range references.
- AAA gas price trends — Recent national and regional retail fuel averages.
- EIA electricity rates — Average residential per-kWh prices used for EV charging.
We summarize publicly available data — no scraping, no external API calls. Figures are calibrated periodically; use the calculators above for your exact inputs.
Frequently asked questions
Which is cheaper to drive, the BMW iX or BMW X5?
At 12,000 miles per year, the BMW iX costs about $738 per year vs $2139 for the BMW X5 — roughly $1401 less per year.
What's the MPG difference between the BMW iX and BMW X5?
The BMW iX is rated around 86 combined MPGe versus 23 MPG for the BMW X5. Highway figures are 87 vs 26.
How much will I spend on fuel over 5 years?
Driving 12,000 miles a year for five years, expect about $3692 for the BMW iX and $10696 for the BMW X5, a difference of roughly $7003.
Is the BMW iX or BMW X5 better for commuting?
For pure cost per mile, the BMW iX wins. EVs charged at home typically deliver the lowest commuting cost, followed by hybrids and efficient compacts.
Which one is better for road trips?
BMW X5 is generally the better road-trip choice — gas and hybrid vehicles win on long highway routes thanks to faster refueling, while EVs work best when charging stops fit your route.
Are these fuel cost numbers accurate for my driving?
They're estimates based on EPA-style combined MPG and average US gas and electricity prices. Real-world cost depends on local fuel prices, driving style, terrain, weather and how much city vs highway driving you do.