BMW M vs Cadillac CT4
The Cadillac CT4 is the more efficient of the two: it reaches 27 mpg combined versus 26 mpg for the BMW M, a 1 mpg advantage and costs about $100 less per year to fuel.
Across 4 measured categories, the Cadillac CT4 leads in 3. Figures are EPA test data, not manufacturer claims.
Head-to-head specifications
| Metric | BMW M | Cadillac CT4 |
|---|---|---|
| Best combined MPG | 26 mpg | 27 mpg ✓ |
| Best city MPG | 23 mpg | 23 mpg |
| Best highway MPG | 32 mpg | 34 mpg ✓ |
| Lowest annual fuel costEPA estimate at 15,000 miles per year | $2,900 | $2,800 ✓ |
| Lowest CO2 output | 264 g/mi ✓ | 327 g/mi |
| Engines offered | SIDI; PHEV, SIDI, SIDI; Mild Hybrid | SIDI |
| Transmissions | Automatic (S8), Manual 6-spd, Automatic (AM-S7) | Automatic (S8), Manual 6-spd, Automatic (S10) |
| Drivetrains | All-Wheel Drive, Rear-Wheel Drive | All-Wheel Drive, Rear-Wheel Drive |
| Fuel types | Premium and Electricity, Premium | Premium |
| EPA class | Subcompact Cars | Compact Cars |
| Years covered | 2015–2027 | 2020–2026 |
| Configurations on record | 236 | 52 |
Source: EPA fuel economy records via fueleconomy.gov. Best-case values across all recorded configurations for each model.
M vs CT4: common questions
Which is better on gas, the BMW M or the Cadillac CT4?
The Cadillac CT4 is the more efficient of the two: it reaches 27 mpg combined versus 26 mpg for the BMW M, a 1 mpg advantage and costs about $100 less per year to fuel.
Which costs less to run per year?
By EPA estimates at 15,000 miles a year, the Cadillac CT4 runs about $2,800 a year in fuel at its most efficient configuration, versus about $2,900 for the BMW M — a difference of roughly $100 per year.
What engines do the M and CT4 offer?
BMW M: SIDI; PHEV, SIDI, SIDI; Mild Hybrid. Cadillac CT4: SIDI.
Are they in the same vehicle class?
The EPA classifies the BMW M as Subcompact Cars and the Cadillac CT4 as Compact Cars, so they aren't a like-for-like match on size.
More M comparisons
Comparison id: bmw-m-vs-cadillac-ct4