2026 head-to-head · Midsize Car
2026 BMW 5 Series 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.
AWD · 3.0L 6-cyl turbo · 8-speed automatic · 68 MPGe + 25 MPG
The 2026 BMW 5 Series Plug-in Hybrid 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 $1,714 a year to fuel (68 MPGe + 25 MPG), versus $2,279 for the 2026 Cadillac CT5 (26 MPG). That's roughly $565 a year, or about $2,827 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 5 Series Plug-in Hybrid
- Cadillac CT5
Side by side
| BMW 5 Series Plug-in Hybrid | Cadillac CT5 | |
|---|---|---|
| $1,714 | Your annual fuel cost | $2,279 |
| 68 MPGe + 25 MPG | Combined efficiency | 26 MPG |
| 65 MPGe / 22 MPG | City | 22 MPG |
| 73 MPGe / 28 MPG | Highway | 31 MPG |
| 49 kWh | Electricity use (kWh/100 mi) | — |
| 430 mi | Driving range | — |
| 34 mi | All-electric range | — |
| 98 cu ft | Passenger volume | 99 cu ft |
| 14 cu ft | Cargo volume | 11 cu ft |
| 133 g/mi | Tailpipe CO₂ (g/mi) | 346 g/mi |
| 7/10 | EPA fuel economy score | 5/10 |
| 9/10 | EPA greenhouse gas score | 5/10 |
| 2 hrs | Charge time at 240V | — |
| Plug-in hybrid | Powertrain | Gas |
| Premium gas + electricity | Fuel | Premium gasoline |
| 3.0L 6-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 5 Series Plug-in Hybrid vs Cadillac CT5 across model years
- BMW 5 Series 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 5 Series Plug-in Hybrid has more cargo space (14 vs. 11 cu ft).
Among 31 2026 midsize cars, the BMW 5 Series Plug-in Hybrid ranks 16th and the Cadillac CT5 25th for lowest fuel cost.
The powertrains differ: the BMW 5 Series 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 5 Series Plug-in Hybrid or the 2026 Cadillac CT5?
Measured by cost to drive, the BMW 5 Series Plug-in Hybrid. The BMW 5 Series Plug-in Hybrid is rated 68 MPGe + 25 MPG combined and the Cadillac CT5 26 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2026 BMW 5 Series 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 $1,714 for the BMW 5 Series Plug-in Hybrid and $2,279 for the Cadillac CT5.
Which has more cargo space?
The BMW 5 Series Plug-in Hybrid, with 14 cu ft of luggage volume versus 11 cu ft (EPA interior volume index).
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