Porsche Taycan vs Cadillac CT5
The Porsche Taycan is the more efficient of the two: it reaches 93 mpg combined versus 27 mpg for the Cadillac CT5, a 66 mpg advantage and costs about $2,000 less per year to fuel.
Across 4 measured categories, the Porsche Taycan leads in 4. Figures are EPA test data, not manufacturer claims.
2020–2026
Porsche Taycan
Compact Cars · 84 configurations
Head-to-head specifications
| Metric | Porsche Taycan | Cadillac CT5 |
|---|---|---|
| Best combined MPG | 93 mpg ✓ | 27 mpg |
| Best city MPG | 94 mpg ✓ | 23 mpg |
| Best highway MPG | 92 mpg ✓ | 33 mpg |
| Lowest annual fuel costEPA estimate at 15,000 miles per year | $800 ✓ | $2,800 |
| Lowest CO2 output | Not available | 333 g/mi |
| Engines offered | Not available | SIDI |
| Transmissions | Automatic (A2) | Automatic (S10), Manual 6-spd |
| Drivetrains | All-Wheel Drive, Rear-Wheel Drive | All-Wheel Drive, Rear-Wheel Drive |
| Fuel types | Electricity | Premium |
| EPA class | Compact Cars | Midsize Cars |
| Years covered | 2020–2026 | 2020–2026 |
| Configurations on record | 84 | 52 |
Source: EPA fuel economy records via fueleconomy.gov. Best-case values across all recorded configurations for each model.
Taycan vs CT5: common questions
Which is better on gas, the Porsche Taycan or the Cadillac CT5?
The Porsche Taycan is the more efficient of the two: it reaches 93 mpg combined versus 27 mpg for the Cadillac CT5, a 66 mpg advantage and costs about $2,000 less per year to fuel.
Which costs less to run per year?
By EPA estimates at 15,000 miles a year, the Porsche Taycan runs about $800 a year in fuel at its most efficient configuration, versus about $2,800 for the Cadillac CT5 — a difference of roughly $2,000 per year.
What engines do the Taycan and CT5 offer?
Porsche Taycan: no engine data on record. Cadillac CT5: SIDI.
Are they in the same vehicle class?
The EPA classifies the Porsche Taycan as Compact Cars and the Cadillac CT5 as Midsize Cars, so they aren't a like-for-like match on size.
More Taycan comparisons
Comparison id: porsche-taycan-vs-cadillac-ct5