2026 head-to-head · Compact Car
2026 BMW 3 Series Hybrid vs Cadillac CT4
MPG, range and what each one really costs you to fuel, from official EPA ratings and recalculated with your own gas and electricity prices.
The 2026 BMW 3 Series Hybrid is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas, it costs about $1,911 a year to fuel (31 MPG), versus $2,279 for the 2026 Cadillac CT4 (26 MPG). That's roughly $368 a year, or about $1,838 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
- BMW 3 Series Hybrid
- Cadillac CT4
Side by side
| BMW 3 Series Hybrid | Cadillac CT4 | |
|---|---|---|
| $1,911 | Your annual fuel cost | $2,279 |
| 31 MPG | Combined efficiency | 26 MPG |
| 28 MPG | City | 22 MPG |
| 35 MPG | Highway | 32 MPG |
| 94 cu ft | Passenger volume | 90 cu ft |
| 13 cu ft | Cargo volume | 11 cu ft |
| 286 g/mi | Tailpipe CO₂ (g/mi) | 345 g/mi |
| 6/10 | EPA fuel economy score | 5/10 |
| 6/10 | EPA greenhouse gas score | 5/10 |
| Hybrid | 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 automatic |
| RWD | Drivetrain | RWD |
✓ 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.
BMW 3 Series Hybrid vs Cadillac CT4 across model years
- BMW 3 Series Hybrid
- Cadillac CT4
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 BMW 3 Series Hybrid has more passenger space (94 vs. 90 cu ft); the BMW 3 Series Hybrid has more cargo space (13 vs. 11 cu ft).
Among 21 2026 compact cars, the BMW 3 Series Hybrid ranks 13th and the Cadillac CT4 16th for lowest fuel cost.
The powertrains differ: the BMW 3 Series Hybrid is a full hybrid, while the Cadillac CT4 is a conventional gas model.
Frequently asked questions
Which is more fuel-efficient, the 2026 BMW 3 Series Hybrid or the 2026 Cadillac CT4?
Measured by cost to drive, the BMW 3 Series Hybrid. The BMW 3 Series Hybrid is rated 31 MPG combined and the Cadillac CT4 26 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2026 BMW 3 Series Hybrid vs. the Cadillac CT4 per year?
At 15,000 miles a year with $3.95/gal premium gas, about $1,911 for the BMW 3 Series Hybrid and $2,279 for the Cadillac CT4.
Which has more cargo space?
The BMW 3 Series Hybrid, with 13 cu ft of luggage volume versus 11 cu ft (EPA interior volume index).
BMW 3 Series Hybrid vs Cadillac CT4 in other years
More 2026 comparisons
BMW 3 Series Hybrid vs…
Or compare the 2026 BMW 3 Series Hybrid with anything else: