2021 head-to-head · Midsize Car
2021 Audi RS 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 · 4.0L 8-cyl turbo · 8-speed automatic · 17 MPG
The 2021 Cadillac CT5 is the cheaper one to run. Driving 15,000 miles a year with $3.95/gal premium gas, it costs about $2,279 a year to fuel (26 MPG), versus $3,485 for the 2021 Audi RS Hybrid (17 MPG). That's roughly $1,206 a year, or about $6,032 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
- Audi RS Hybrid
- Cadillac CT5
Side by side
| Audi RS Hybrid | Cadillac CT5 | |
|---|---|---|
| $3,485 | Your annual fuel cost | $2,279 |
| 17 MPG | Combined efficiency | 26 MPG |
| 15 MPG | City | 23 MPG |
| 22 MPG | Highway | 32 MPG |
| 95 cu ft | Passenger volume | 99 cu ft |
| 25 cu ft | Cargo volume | 13 cu ft |
| 507 g/mi | Tailpipe CO₂ (g/mi) | 337 g/mi |
| 3/10 | EPA fuel economy score | 5/10 |
| 3/10 | EPA greenhouse gas score | 5/10 |
| Hybrid | Powertrain | Gas |
| Premium gasoline | Fuel | Premium gasoline |
| 4.0L 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.
Audi RS Hybrid vs Cadillac CT5 across model years
- Audi RS 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 Cadillac CT5 has more passenger space (99 vs. 95 cu ft); the Audi RS Hybrid has more cargo space (25 vs. 13 cu ft).
Among 54 2021 midsize cars, the Audi RS Hybrid ranks 52nd and the Cadillac CT5 39th for lowest fuel cost.
The powertrains differ: the Audi RS Hybrid is a full hybrid, while the Cadillac CT5 is a conventional gas model.
Frequently asked questions
Which is more fuel-efficient, the 2021 Audi RS Hybrid or the 2021 Cadillac CT5?
Measured by cost to drive, the Cadillac CT5. The Audi RS Hybrid is rated 17 MPG combined and the Cadillac CT5 26 MPG (EPA, most efficient configuration of each).
How much does it cost to fuel the 2021 Audi RS Hybrid vs. the Cadillac CT5 per year?
At 15,000 miles a year with $3.95/gal premium gas, about $3,485 for the Audi RS Hybrid and $2,279 for the Cadillac CT5.
Which has more cargo space?
The Audi RS Hybrid, with 25 cu ft of luggage volume versus 13 cu ft (EPA interior volume index).
Audi RS Hybrid vs Cadillac CT5 in other years
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