2026 head-to-head · Compact Car
2026 Cadillac CT4 vs Mercedes-Benz CLA-Class
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
AWD · 2.0L 4-cyl turbo · 8-speed dual-clutch · 23 MPG
The 2026 Cadillac CT4 is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas, it costs about $2,279 a year to fuel (26 MPG), versus $2,576 for the 2026 Mercedes-Benz CLA-Class (23 MPG). That's roughly $297 a year, or about $1,486 over five years.
Your numbers
Change these to match your driving and local prices. Every figure and chart on this page updates.
Fuel cost over 10 years
- Cadillac CT4
- Mercedes-Benz CLA-Class
Side by side
| Cadillac CT4 | Mercedes-Benz CLA-Class | |
|---|---|---|
| $2,279 | Your annual fuel cost | $2,576 |
| 26 MPG | Combined efficiency | 23 MPG |
| 22 MPG | City | 20 MPG |
| 32 MPG | Highway | 28 MPG |
| 90 cu ft | Passenger volume | 89 cu ft |
| 11 cu ft | Cargo volume | 12 cu ft |
| 345 g/mi | Tailpipe CO₂ (g/mi) | 379 g/mi |
| 5/10 | EPA fuel economy score | 5/10 |
| 5/10 | EPA greenhouse gas score | 5/10 |
| Gas | Powertrain | Gas |
| Premium gasoline | Fuel | Premium gasoline |
| 2.0L 4-cyl turbo | Engine / motor | 2.0L 4-cyl turbo |
| 8-speed automatic | Transmission | 8-speed dual-clutch |
| RWD | Drivetrain | AWD |
✓ marks the better value. EPA scores run 1–10 (10 is best). Volumes come from the EPA interior volume index and aren't published for every body style.
Cadillac CT4 vs Mercedes-Benz CLA-Class across model years
- Cadillac CT4
- Mercedes-Benz CLA-Class
Annual fuel cost of the most efficient configuration of each model year, at your prices. Click a point to open that year.
How they differ
Per EPA interior volume figures, the Mercedes-Benz CLA-Class has more cargo space (12 vs. 11 cu ft).
Among 21 2026 compact cars, the Cadillac CT4 ranks 16th and the Mercedes-Benz CLA-Class 18th for lowest fuel cost.
Frequently asked questions
Which is more fuel-efficient, the 2026 Cadillac CT4 or the 2026 Mercedes-Benz CLA-Class?
Measured by cost to drive, the Cadillac CT4. The Cadillac CT4 is rated 26 MPG combined and the Mercedes-Benz CLA-Class 23 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2026 Cadillac CT4 vs. the Mercedes-Benz CLA-Class per year?
At 15,000 miles a year with $3.95/gal premium gas, about $2,279 for the Cadillac CT4 and $2,576 for the Mercedes-Benz CLA-Class.
Which has more cargo space?
The Mercedes-Benz CLA-Class, with 12 cu ft of luggage volume versus 11 cu ft (EPA interior volume index).
Cadillac CT4 vs Mercedes-Benz CLA-Class in other years
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