Audi Q4 e-tron vs BMW iX: Specs Compared
Also searched as BMW iX vs Audi Q4 e-tron specs — both orientations show this same side-by-side comparison.
The Audi Q4 e-tron is the more efficient of the two: it reaches 115 mpg combined versus 97 mpg for the BMW iX, a 18 mpg advantage and costs about $150 less per year to fuel.
Across 4 measured categories, the Audi Q4 e-tron leads in 4. Figures are EPA test data, not manufacturer claims.
2022–2026
Audi Q4 e-tron
Standard Sport Utility Vehicle 4WD · 16 configurations
2022–2026
BMW iX
Standard Sport Utility Vehicle 4WD · 35 configurations
Head-to-head specifications
| Metric | Audi Q4 e-tron | BMW iX |
|---|---|---|
| Best combined MPG | 115 mpg ✓ | 97 mpg |
| Best city MPG | 125 mpg ✓ | 99 mpg |
| Best highway MPG | 104 mpg ✓ | 94 mpg |
| Lowest annual fuel costEPA estimate at 15,000 miles per year | $650 ✓ | $800 |
| Lowest CO2 output | Not available | Not available |
| Engines offered | Not available | Not available |
| Transmissions | Automatic (A1) | Automatic (A1) |
| Drivetrains | All-Wheel Drive, Rear-Wheel Drive | All-Wheel Drive |
| Fuel types | Electricity | Electricity |
| EPA class | Standard Sport Utility Vehicle 4WD | Standard Sport Utility Vehicle 4WD |
| Years covered | 2022–2026 | 2022–2026 |
| Configurations on record | 16 | 35 |
Source: EPA fuel economy records via fueleconomy.gov. Best-case values across all recorded configurations for each model.
Audi Q4 e-tron vs BMW iX dimensions and size
The BMW iX is 14.2 inches longer than the Audi Q4 e-tron on a wheelbase 9.4 inches longer, and 815.7 lbs heavier. Both clear the roughly 200 inches of usable length in a standard single garage bay.
| Dimension | Audi Q4 e-tron (2026) | BMW iX (2026) | Difference |
|---|---|---|---|
| Length | 180.7 in | 194.9 in | 14.2 in |
| Width (excl. mirrors) | 73.6 in | 77.2 in | 3.5 in |
| Height | 63.4 in | 66.5 in | 3.1 in |
| Wheelbase | 108.7 in | 118.1 in | 9.4 in |
| Curb weight | 4,872 lbs | 5,688 lbs | 816 lbs |
Width excludes mirrors; add 8–12 inches for mirrors out. Figures are for the newest model year on record for each vehicle. See both drawn to scale.
Audi Q4 e-tron vs BMW iX: what the numbers mean
Running cost over five years: at the EPA's 15,000-mile-a-year assumption the Audi Q4 e-tron burns about $650 of fuel annually against $800 for the BMW iX. That $150 yearly gap compounds to roughly $750 over five years and $1,200 over eight — often more than the price difference between two trims of the same vehicle, and the single largest running-cost line item separating these two.
City and highway economy: the Audi Q4 e-tron leads in both cycles — 125 mpg city and 104 mpg highway against 99 and 94 mpg — so its fuel-efficiency advantage holds whether you commute in traffic or cover long highway miles.
Drivetrain and class: the Audi Q4 e-tron is offered with All-Wheel Drive, Rear-Wheel Drive, the BMW iX with All-Wheel Drive. All-wheel drive typically costs one to two mpg combined against the same vehicle in front- or rear-wheel drive, which is worth remembering when the gap between these two is small. The EPA classes them as Standard Sport Utility Vehicle 4WD and Standard Sport Utility Vehicle 4WD respectively — the class drives the interior volume, cargo space and passenger space each one is measured against.
Q4 e-tron vs iX: common questions
Which is better on gas, the Audi Q4 e-tron or the BMW iX?
The Audi Q4 e-tron is the more efficient of the two: it reaches 115 mpg combined versus 97 mpg for the BMW iX, a 18 mpg advantage and costs about $150 less per year to fuel.
Which costs less to run per year?
By EPA estimates at 15,000 miles a year, the Audi Q4 e-tron runs about $650 a year in fuel at its most efficient configuration, versus about $800 for the BMW iX — a difference of roughly $150 per year.
What engines do the Q4 e-tron and iX offer?
Audi Q4 e-tron: no engine data on record. BMW iX: no engine data on record.
Are they in the same vehicle class?
Yes — the EPA classifies both the Audi Q4 e-tron and the BMW iX as Standard Sport Utility Vehicle 4WD, so they compete directly.
More Q4 e-tron comparisons
More iX comparisons
Comparison id: audi-q4-e-tron-vs-bmw-ix