Audi SQ8 e-tron vs Cadillac OPTIQ: Specs Compared
Also searched as Cadillac OPTIQ vs Audi SQ8 e-tron specs — both orientations show this same side-by-side comparison.
The Cadillac OPTIQ is the more efficient of the two: it reaches 105 mpg combined versus 73 mpg for the Audi SQ8 e-tron, a 32 mpg advantage and costs about $350 less per year to fuel.
Across 4 measured categories, the Cadillac OPTIQ leads in 4. Figures are EPA test data, not manufacturer claims.
2024–2025
Audi SQ8 e-tron
Standard Sport Utility Vehicle 4WD · 8 configurations
2026–2027
Cadillac OPTIQ
Standard Sport Utility Vehicle 2WD · 12 configurations
Head-to-head specifications
| Metric | Audi SQ8 e-tron | Cadillac OPTIQ |
|---|---|---|
| Best combined MPG | 73 mpg | 105 mpg ✓ |
| Best city MPG | 72 mpg | 117 mpg ✓ |
| Best highway MPG | 75 mpg | 93 mpg ✓ |
| Lowest annual fuel costEPA estimate at 15,000 miles per year | $1,050 | $700 ✓ |
| Lowest CO2 output | Not available | Not available |
| Engines offered | Not available | Not available |
| Transmissions | Automatic (A1), Automatic (A2) | 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 2WD |
| Years covered | 2024–2025 | 2026–2027 |
| Configurations on record | 8 | 12 |
Source: EPA fuel economy records via fueleconomy.gov. Best-case values across all recorded configurations for each model.
Audi SQ8 e-tron vs Cadillac OPTIQ dimensions and size
The Audi SQ8 e-tron is 3.9 inches longer than the Cadillac OPTIQ on a wheelbase 0.8 inches shorter, and 639.3 lbs heavier. Both clear the roughly 200 inches of usable length in a standard single garage bay.
| Dimension | Audi SQ8 e-tron (2025) | Cadillac OPTIQ (2026) | Difference |
|---|---|---|---|
| Length | 193.7 in | 189.8 in | 3.9 in |
| Width (excl. mirrors) | 76.4 in | 75.2 in | 1.2 in |
| Height | 64.2 in | 64.6 in | 0.4 in |
| Wheelbase | 115.4 in | 116.1 in | 0.8 in |
| Curb weight | 5,842 lbs | 5,203 lbs | 639 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 SQ8 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 Cadillac OPTIQ burns about $700 of fuel annually against $1,050 for the Audi SQ8 e-tron. That $350 yearly gap compounds to roughly $1,750 over five years and $2,800 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 Cadillac OPTIQ leads in both cycles — 117 mpg city and 93 mpg highway against 72 and 75 mpg — so its fuel-efficiency advantage holds whether you commute in traffic or cover long highway miles.
Drivetrain and class: the Audi SQ8 e-tron is offered with All-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.
SQ8 e-tron vs OPTIQ: common questions
Which is better on gas, the Audi SQ8 e-tron or the Cadillac OPTIQ?
The Cadillac OPTIQ is the more efficient of the two: it reaches 105 mpg combined versus 73 mpg for the Audi SQ8 e-tron, a 32 mpg advantage and costs about $350 less per year to fuel.
Which costs less to run per year?
By EPA estimates at 15,000 miles a year, the Cadillac OPTIQ runs about $700 a year in fuel at its most efficient configuration, versus about $1,050 for the Audi SQ8 e-tron — a difference of roughly $350 per year.
What engines do the SQ8 e-tron and OPTIQ offer?
Audi SQ8 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 SQ8 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 SQ8 e-tron comparisons
More OPTIQ comparisons
Comparison id: audi-sq8-e-tron-vs-cadillac-optiq