Cadillac CT4 vs Mercedes-Benz C-Class
The Mercedes-Benz C-Class is the more efficient of the two: it reaches 30 mpg combined versus 27 mpg for the Cadillac CT4, a 3 mpg advantage and costs about $250 less per year to fuel.
Across 5 measured categories, the Mercedes-Benz C-Class leads in 5. Figures are EPA test data, not manufacturer claims.
2015–2027
Mercedes-Benz C-Class
Subcompact Cars · 123 configurations
Head-to-head specifications
| Metric | Cadillac CT4 | Mercedes-Benz C-Class |
|---|---|---|
| Best combined MPG | 27 mpg | 30 mpg ✓ |
| Best city MPG | 23 mpg | 28 mpg ✓ |
| Best highway MPG | 34 mpg | 36 mpg ✓ |
| Lowest annual fuel costEPA estimate at 15,000 miles per year | $2,800 | $2,550 ✓ |
| Lowest CO2 output | 327 g/mi | 215 g/mi ✓ |
| Engines offered | SIDI | SIDI; Mild Hybrid, SIDI & PFI, SIDI; PHEV, SIDI |
| Transmissions | Automatic (S8), Manual 6-spd, Automatic (S10) | Automatic 9-spd, Automatic 7-spd |
| Drivetrains | All-Wheel Drive, Rear-Wheel Drive | All-Wheel Drive, Rear-Wheel Drive, 4-Wheel Drive |
| Fuel types | Premium | Premium, Premium and Electricity |
| EPA class | Compact Cars | Subcompact Cars |
| Years covered | 2020–2026 | 2015–2027 |
| Configurations on record | 52 | 123 |
Source: EPA fuel economy records via fueleconomy.gov. Best-case values across all recorded configurations for each model.
CT4 vs C-Class: common questions
Which is better on gas, the Cadillac CT4 or the Mercedes-Benz C-Class?
The Mercedes-Benz C-Class is the more efficient of the two: it reaches 30 mpg combined versus 27 mpg for the Cadillac CT4, a 3 mpg advantage and costs about $250 less per year to fuel.
Which costs less to run per year?
By EPA estimates at 15,000 miles a year, the Mercedes-Benz C-Class runs about $2,550 a year in fuel at its most efficient configuration, versus about $2,800 for the Cadillac CT4 — a difference of roughly $250 per year.
What engines do the CT4 and C-Class offer?
Cadillac CT4: SIDI. Mercedes-Benz C-Class: SIDI; Mild Hybrid, SIDI & PFI, SIDI; PHEV, SIDI.
Are they in the same vehicle class?
The EPA classifies the Cadillac CT4 as Compact Cars and the Mercedes-Benz C-Class as Subcompact Cars, so they aren't a like-for-like match on size.
More CT4 comparisons
Comparison id: cadillac-ct4-vs-mercedes-benz-c-class