Audi Q4 e-tron vs Cadillac OPTIQ: Specs Compared
Also searched as Cadillac OPTIQ 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 105 mpg for the Cadillac OPTIQ, a 10 mpg advantage and costs about $50 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
2026–2027
Cadillac OPTIQ
Standard Sport Utility Vehicle 2WD · 12 configurations
Head-to-head specifications
| Metric | Audi Q4 e-tron | Cadillac OPTIQ |
|---|---|---|
| Best combined MPG | 115 mpg ✓ | 105 mpg |
| Best city MPG | 125 mpg ✓ | 117 mpg |
| Best highway MPG | 104 mpg ✓ | 93 mpg |
| Lowest annual fuel costEPA estimate at 15,000 miles per year | $650 ✓ | $700 |
| 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 | Rear-Wheel Drive, All-Wheel Drive |
| Fuel types | Electricity | Electricity |
| EPA class | Standard Sport Utility Vehicle 4WD | Standard Sport Utility Vehicle 2WD |
| Years covered | 2022–2026 | 2026–2027 |
| Configurations on record | 16 | 12 |
Source: EPA fuel economy records via fueleconomy.gov. Best-case values across all recorded configurations for each model.
Audi Q4 e-tron vs Cadillac OPTIQ dimensions and size
The Cadillac OPTIQ is 9.1 inches longer than the Audi Q4 e-tron on a wheelbase 7.5 inches longer, and 330.7 lbs heavier. Both clear the roughly 200 inches of usable length in a standard single garage bay.
| Dimension | Audi Q4 e-tron (2026) | Cadillac OPTIQ (2026) | Difference |
|---|---|---|---|
| Length | 180.7 in | 189.8 in | 9.1 in |
| Width (excl. mirrors) | 73.6 in | 75.2 in | 1.6 in |
| Height | 63.4 in | 64.6 in | 1.2 in |
| Wheelbase | 108.7 in | 116.1 in | 7.5 in |
| Curb weight | 4,872 lbs | 5,203 lbs | 331 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 Cadillac OPTIQ: 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 $700 for the Cadillac OPTIQ. That $50 yearly gap compounds to roughly $250 over five years and $400 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 117 and 93 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 Cadillac OPTIQ with Rear-Wheel Drive, 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 2WD respectively — the class drives the interior volume, cargo space and passenger space each one is measured against.
Q4 e-tron vs OPTIQ: common questions
Which is better on gas, the Audi Q4 e-tron or the Cadillac OPTIQ?
The Audi Q4 e-tron is the more efficient of the two: it reaches 115 mpg combined versus 105 mpg for the Cadillac OPTIQ, a 10 mpg advantage and costs about $50 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 $700 for the Cadillac OPTIQ — a difference of roughly $50 per year.
What engines do the Q4 e-tron and OPTIQ offer?
Audi Q4 e-tron: no engine data on record. Cadillac OPTIQ: no engine data on record.
Are they in the same vehicle class?
The EPA classifies the Audi Q4 e-tron as Standard Sport Utility Vehicle 4WD and the Cadillac OPTIQ as Standard Sport Utility Vehicle 2WD, so they aren't a like-for-like match on size.
More Q4 e-tron comparisons
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Comparison id: audi-q4-e-tron-vs-cadillac-optiq