18 MPG combined. That’s the official EPA fuel economy rating for the 2023 Porsche Cayenne Turbo S e-Hybrid Coupe 4.0L 8-cyl, and honestly, it’s probably not the first, second, or even tenth thing that comes to mind when considering a vehicle with this much performance. The Cayenne isn’t about squeezing every last mile out of a gallon of fuel; it’s about experiencing exhilarating acceleration and dynamic handling in a stylish, coupe-like SUV, with the appeal of a hybrid system that slightly offsets the thirst of a twin-turbocharged V8.

City and highway performance

The EPA estimates of 17 MPG in the city and 20 MPG on the highway reflect the varying nature of this Cayenne. In urban environments, stop-and-go traffic will inevitably lead to more frequent gasoline engine engagement, even with a fully charged battery. The electric motor can provide some purely electric miles, but the battery’s range is limited. On the open road, the Cayenne Turbo S e-Hybrid Coupe fares slightly better. Its advanced eight-speed automatic transmission helps keep the engine in its most efficient range at cruising speeds. Still, any spirited driving will quickly diminish any attempt at fuel conservation.

Annual fuel cost

The EPA estimates that the annual fuel cost for the 2023 Porsche Cayenne Turbo S e-Hybrid Coupe will be $3,200 based on driving 15,000 miles per year, with a mix of city and highway driving, using national average fuel prices. Remember that this is just an estimate. Your actual fuel costs will vary depending on your driving habits, the type of fuel you use, and how often you use the electric driving mode. Someone who frequently charges and prioritizes electric driving will undoubtedly spend less than the EPA estimate, while those who treat every drive like a track day will far exceed it.

Real-world expectations

Potential buyers of the Cayenne Turbo S e-Hybrid Coupe are generally enthusiasts who prioritize performance and exclusivity over outright fuel efficiency. They appreciate the combination of acceleration, comfortable luxury, and Porsche’s driving dynamics. For this demographic, the fuel economy is simply a cost. While they may appreciate the fuel savings offered by the hybrid system, it is unlikely to be a major determining factor in their purchase decision. The ability to quietly cruise around town on electric power might be more appealing, offering less gas and a refined experience when desired. Check our CAYENNE MPG across all years for further insight into the efficiency of other models.

How it compares

Compared to other high-performance SUVs, the Cayenne Turbo S e-Hybrid Coupe’s fuel economy is in the expected range. The BMW X5 M, which delivers similar levels of performance, achieves around 15 MPG combined. The Mercedes-AMG GLE 63 S Coupe is rated at approximately 16 MPG combined. Even the non-hybrid Cayenne Turbo manages only 17 MPG combined. While the Cayenne’s hybrid system offers a marginal improvement, it’s primarily about amplified performance and limited electric driving capability. For those seeking better fuel economy in a luxury SUV, the Lexus RX 450h offers significantly better mileage at 31 MPG combined, but with considerably less performance. For all Porsche fuel economy data, you can check our additional pages.

Tips to maximize efficiency

Take advantage of the electric driving modes. Prioritize electric-only operation whenever possible, especially for short trips around town. Fully charging the battery regularly will maximize your electric range and reduce your reliance on the gasoline engine.

Use the Porsche Connect app to pre-condition the cabin temperature while the vehicle is plugged in. This will reduce the energy demand on the battery at the start of your journey, preserving your electric range.

Avoid aggressive acceleration and hard braking. The Cayenne Turbo S e-Hybrid Coupe is quick, but driving it with restraint will noticeably improve fuel economy. Use the adaptive cruise control system on the highway to maintain a consistent speed and minimize unnecessary acceleration.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance and reduce fuel efficiency. Check your tire pressures regularly and inflate them to the manufacturer’s recommended levels.

Consider switching to a high-quality, low-rolling resistance tire when it’s time for replacement. These tires are designed to reduce friction and improve fuel economy without compromising handling or performance.