2026 head-to-head · Midsize Car
2026 BMW M Plug-in Hybrid vs Cadillac CT5
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 Cadillac CT5 is the cheaper one to run. Driving 15,000 miles a year with 18¢/kWh electricity and $3.95/gal premium gas, it costs about $2,279 a year to fuel (26 MPG), versus $2,650 for the 2026 BMW M Plug-in Hybrid (47 MPGe + 14 MPG). That's roughly $371 a year, or about $1,855 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 M Plug-in Hybrid
- Cadillac CT5
Side by side
| BMW M Plug-in Hybrid | Cadillac CT5 | |
|---|---|---|
| $2,650 | Your annual fuel cost | $2,279 |
| 47 MPGe + 14 MPG | Combined efficiency | 26 MPG |
| 41 MPGe / 12 MPG | City | 22 MPG |
| 57 MPGe / 19 MPG | Highway | 31 MPG |
| 55 kWh | Electricity use (kWh/100 mi) | — |
| 280 mi | Driving range | — |
| 29 mi | All-electric range | — |
| 98 cu ft | Passenger volume | 99 cu ft |
| 13 cu ft | Cargo volume | 11 cu ft |
| 264 g/mi | Tailpipe CO₂ (g/mi) | 346 g/mi |
| 5/10 | EPA fuel economy score | 5/10 |
| 6/10 | EPA greenhouse gas score | 5/10 |
| 2 hrs | Charge time at 240V | — |
| Plug-in hybrid | Powertrain | Gas |
| Premium gas + electricity | Fuel | Premium gasoline |
| 4.4L 8-cyl turbo | Engine / motor | 2.0L 4-cyl turbo |
| 8-speed automatic | Transmission | 10-speed automatic |
| AWD | 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 M Plug-in Hybrid vs Cadillac CT5 across model years
- BMW M Plug-in Hybrid
- Cadillac CT5
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 M Plug-in Hybrid has more cargo space (13 vs. 11 cu ft).
Among 31 2026 midsize cars, the BMW M Plug-in Hybrid ranks 28th and the Cadillac CT5 25th for lowest fuel cost.
The powertrains differ: the BMW M Plug-in Hybrid is a plug-in hybrid, while the Cadillac CT5 is a conventional gas model.
Frequently asked questions
Which is more fuel-efficient, the 2026 BMW M Plug-in Hybrid or the 2026 Cadillac CT5?
Measured by cost to drive, the Cadillac CT5. The BMW M Plug-in Hybrid is rated 47 MPGe + 14 MPG combined and the Cadillac CT5 26 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2026 BMW M Plug-in Hybrid vs. the Cadillac CT5 per year?
At 15,000 miles a year with 18¢/kWh electricity and $3.95/gal premium gas, about $2,650 for the BMW M Plug-in Hybrid and $2,279 for the Cadillac CT5.
Which has more cargo space?
The BMW M Plug-in Hybrid, with 13 cu ft of luggage volume versus 11 cu ft (EPA interior volume index).
BMW M Plug-in Hybrid vs Cadillac CT5 in other years
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