21 MPG combined is a perfectly acceptable figure for the 2019 Porsche Panamera 4S, a luxury performance vehicle that happens to be a four-door sedan. This isn’t a Prius, nor should it be. Buyers spending six figures on a Porsche aren’t prioritizing fuel consumption above all else; they want exhilarating performance, head-turning style, and a comfortable, tech-laden cabin. The Panamera 4S delivers all of that, and the fuel economy is simply the price of admission.

City and highway performance

The EPA estimates of 18 MPG in the city and 26 MPG on the highway reflect the compromises inherent in a vehicle with this level of performance. In urban environments, the powerful 2.9L twin-turbo V6, producing 440 horsepower, is constantly tempted to stretch its legs, even in brief spurts. The eight-speed automatic transmission (AM-S8) is exceptionally smooth around town, but its eagerness to downshift for immediate power inevitably impacts fuel consumption. Highway driving paints a somewhat brighter picture, as the Panamera 4S settles into a more efficient cruising mode. However, the temptation to exploit its overtaking ability, coupled with the aerodynamic drag of its wider tires, prevents it from achieving economy figures comparable to, say, a hybrid sedan. The stop/start system is useful in slowing fuel consumption when stopped, although some drivers prefer to manually deactivate the system.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2019 Porsche Panamera 4S at $2,750. 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. The calculation also relies on the national average fuel price at the time of testing. It’s important to understand that this is merely an estimate. Actual fuel costs will fluctuate depending on individual driving habits, prevailing fuel prices in your area, and the type of fuel used, however, the figure provides a consistent baseline for comparing vehicles.

Real-world expectations

While the EPA estimates provide a standardized benchmark, real-world fuel economy can vary significantly. Panamera 4S drivers who frequently use the Sport or Sport Plus modes can expect to see figures closer to the city estimate, even on mixed driving cycles. However, drivers who prioritize smooth acceleration and consistent speeds on long highway journeys might improve on the EPA’s highway estimate. Weather conditions, tire pressure, and even the use of accessories like air conditioning can all influence fuel consumption. As with most high-performance vehicles, aggressive driving habits will have a noticeable impact on the fuel gauge.

How it compares

Compared to other vehicles in its class, the 2019 Porsche Panamera 4S offers fuel economy that aligns with its performance. The Mercedes-AMG CLS 53, for example, achieves an EPA-estimated 21 MPG combined, directly competing with the Panamera 4S. The BMW M550i xDrive, another performance-oriented sedan, manages around 20 MPG combined. For buyers considering lower fuel costs, Porsche has traditionally manufactured the E-Hybrid trim of the Panamera. For more information, review all Porsche fuel economy data and PANAMERA MPG across all years.

Tips to maximize efficiency

Smooth and predictable acceleration is key. Avoid “jackrabbit” starts and unnecessary bursts of speed. The Panamera 4S delivers effortless performance when asked, so there’s no need to push it harder than necessary to keep pace with traffic. Anticipate traffic flow and maintain a consistent speed whenever possible.

Monitor and maintain proper tire inflation. Under-inflated tires increase rolling resistance and significantly decrease fuel economy. Check your tire pressure regularly and inflate them to the manufacturer’s recommended specifications, which can be found on a sticker inside the driver’s side door jamb.

Engage the “Normal” driving mode when performance isn’t a priority. While the Sport and Sport Plus modes enhance throttle response and shift patterns for maximum performance, they also consume more fuel. Use these modes judiciously, reserving them for spirited driving on winding roads or for occasional bursts of acceleration. The “Normal” setting will provide a more relaxed and efficient driving experience for daily commutes and highway cruising.

Reduce unnecessary weight. Remove any items from the trunk or rear seats that you don’t need. Extra weight increases the engine’s workload and negatively impacts fuel efficiency. A lighter car is a more efficient car.

Service the car regularly. Oil and filter services keep your engine running efficiently for years to come. Be sure to have a qualified technician check your engine and other components for wear and tear, sticking to the service intervals recommended by Porsche.