22 MPG combined isn’t going to win any hypermiling contests, but it’s also entirely beside the point if you’re considering a 2018 Porsche 911 Targa 4 GTS. This car is about the experience: the sound, the feel, the precise handling, and the sheer joy of open-top motoring combined with all-weather grip. The buyer who seeks out a Targa 4 GTS isn’t prioritizing fuel efficiency. They desire a visceral driving experience, everyday usability, and iconic styling. If fuel economy were their main concern, they’d be looking at something vastly different.

City and highway performance

The EPA estimates of 20 MPG in the city and 26 MPG on the highway reflect the nature of this car’s performance. The 3.0-liter twin-turbo flat-six engine, while potent, needs to work harder in stop-and-go city driving. The seven-speed Porsche Doppelkupplung (PDK) transmission does its best to optimize efficiency, but the engine’s inherent thirst for fuel becomes apparent when accelerating frequently.

On the open road, the Targa 4 GTS settles into a more relaxed cruise, allowing the engine to operate more efficiently and resulting in the better highway figure. The all-wheel-drive system also adds a small amount of weight and complexity, contributing to a slight decrease in fuel economy compared to rear-wheel-drive models.

Annual fuel cost

The EPA estimates that the annual fuel cost for the 2018 Porsche 911 Targa 4 GTS is $2,650. This figure is based on driving 15,000 miles per year, with 55% of those miles driven in the city and 45% on the highway. It also assumes the use of premium fuel, which is required for optimal performance and longevity of the engine. This is just an estimate, and your actual fuel costs may vary depending on your driving habits, local fuel prices, and the type of driving you do.

Real-world expectations

While the EPA estimates provide a benchmark, real-world fuel economy often varies. If you frequently exploit the Targa 4 GTS’s performance potential, expect fuel economy closer to the city rating. Gentle highway cruising may deliver results slightly better than the EPA’s 26 MPG. Aggressive acceleration, frequent use of Sport or Sport Plus modes, and driving in hilly or mountainous terrain will all negatively impact fuel economy. The driver who enjoys the car’s capabilities will likely find themselves closer to the 20 MPG mark than the 26 MPG one. See 911 MPG across all years.

How it compares

Compared to other performance cars in its class, the 2018 Porsche 911 Targa 4 GTS’s fuel economy is within a reasonable range, considering its power and all-wheel-drive system. For example, the Audi R8 V10 Spyder, another high-performance convertible with all-wheel drive, gets an EPA-estimated 16 MPG combined. A Mercedes-AMG GT C Roadster achieves around 18 MPG combined. Even within the 911 lineup, opting for a Carrera S with rear-wheel drive improves fuel economy to around 23 MPG combined. These MPG differences highlight the tradeoff between performance, features, and efficiency, catering to different priorities among performance car buyers. Also, you can view all Porsche fuel economy data.

Tips to maximize efficiency

Anticipate traffic and maintain a steady speed whenever possible. Avoiding sudden acceleration and braking can significantly improve fuel economy. The PDK transmission is designed to shift efficiently; let it do its job without excessive driver input.

Ensure your tires are properly inflated. Underinflated tires increase rolling resistance, which requires the engine to work harder and consume more fuel. Check your tire pressures regularly and inflate them to the recommended levels listed on the doorjamb.

Minimize aerodynamic drag. Remove any unnecessary items from the car, such as roof racks or cargo carriers, when not in use. These items increase drag and reduce fuel efficiency, especially at higher speeds.

Consider using the car’s Eco mode, if equipped (though this might detract from the driving experience). Eco mode typically adjusts the engine mapping and transmission shift points to prioritize fuel efficiency over performance. While it might slightly dull the throttle response, it can contribute to noticeable fuel savings, particularly in city driving.