19 MPG combined for the 2026 Porsche 911 Targa 4 GTS with its 3.6L flat-six engine and the lightning-quick automatic (AM-S8) transmission is engineering brilliance that allows such an engaging, characterful machine to exist within modern efficiency standards. This isn’t a vehicle bought for its low fuel consumption; it’s chosen for the visceral thrill of its open-air driving experience, the intoxicating howl of its naturally aspirated-ish engine (Porsche’s hybridizations are subtle), and the unparalleled tactility of its chassis. A buyer of a Targa 4 GTS understands they are investing in a rolling work of art, a performance icon, and the fuel economy, while respectable for the segment, is simply a line item on a much larger emotional balance sheet. What they prioritize is the uncompromising performance, the impeccable build quality, and the sheer joy of piloting one of the automotive world’s most enduring legends.

City and highway performance

The EPA rating of 17 MPG in the city for the 911 Targa 4 GTS reflects the reality of its powerful engine and the desire of its drivers to *indulge* in its capabilities. Stop-and-go traffic isn’t where this car shines brightest, nor is it where its drivers typically seek efficiency. The 3.6L six-cylinder, always eager to rev, will naturally consume more fuel when constrained by urban environments. On the highway, however, the numbers improve to a more commendable 23 MPG. This is where the car’s aerodynamics, the precise gearing of the AM-S8 transmission, and the inherent efficiency of a well-engineered powertrain can truly stretch their legs. Cruising on the open road, the Targa 4 GTS settles into a rhythm, offering a surprisingly comfortable and efficient long-distance touring experience for a car of its performance pedigree.

Annual fuel cost

The EPA estimates an annual fuel cost of $3,050 for the 2026 Porsche 911 Targa 4 GTS. This figure uses 15,000 miles of driving per year, split 55% highway and 45% city, and national average fuel prices. For the individual purchasing a Targa 4 GTS, this $3,050 figure is likely a rounding error in their overall annual vehicle expenditure. They know that the acquisition cost, insurance premiums, maintenance for a high-performance vehicle, and potential modifications will dwarf this annual fuel bill. The consideration isn’t whether they can *afford* the fuel, but rather that the fuel consumption aligns with the vehicle’s mission and performance capabilities. It’s a pragmatic recognition that power demands premium fuel, and premium fuel costs money. For more information on all Porsche fuel economy data, please consult our comprehensive database.

Real-world expectations

In the real world, the fuel economy of the Targa 4 GTS will fluctuate depending on the driver’s mood and the road. Those who frequently tap into the intoxicating mid-range and unleash the full fury of the 3.6L engine will inevitably see numbers dip below the EPA estimates, particularly on spirited B-road blasts or track days. Conversely, a driver using the car for quiet highway cruises with the Targa top stowed away, enjoying the open air and the distant growl of the flat-six, might even exceed the 23 MPG highway rating. The character of this car actively encourages enthusiastic driving; its fuel economy is directly proportional to how much that character is exploited. The buyer knows this and embraces it. The fuel gauge is simply a reminder of the joyful miles recently consumed.

How it compares

When stacked against its direct and indirect competitors, the 911 Targa 4 GTS holds its own surprisingly well. Consider the 2026 Chevrolet Corvette Z06, for example, which with its larger displacement V8 will likely achieve closer to 14-16 MPG combined. Audi’s R8 V10, if it persists, typically hovers around 15-17 MPG combined. Even within the 911 lineup, 911 MPG across all years shows variations. A standard 911 Carrera 4 GTS might nudge closer to 20 MPG combined due to slightly different tuning or tire compounds, but the Targa’s unique roof mechanism adds weight and alters aerodynamics subtly. The Targa 4 GTS truly shines in comparison because of its unique blend of open-air exhilaration, everyday usability, and Porsche’s legendary build quality, all while delivering fuel economy that, for a high-performance sports car, is entirely acceptable and competitive within its rarefied realm. It’s not the most efficient, but it’s far from the least, striking a remarkable balance for what it offers.

Tips to maximize efficiency

While efficiency isn’t the primary motivator for Targa 4 GTS ownership, drivers can still employ strategies to optimize their mileage without dulling the driving experience. Smooth, progressive throttle inputs are key, avoid abrupt acceleration and braking. The AM-S8 transmission is an engineering marvel, and letting it manage shifts efficiently in its normal modes will generally yield better results than forcing manual gear changes unless precisely timed for performance.

Use the car’s cruise control on highways. Maintaining a consistent speed not only reduces driver fatigue but also minimizes unnecessary fuel consumption caused by minor speed variations. The drivetrain is designed to operate most efficiently at a steady state.

Regular maintenance is important. Keeping the engine optimally tuned, tires correctly inflated to Porsche’s recommended pressures, and ensuring all fluids are at their proper levels contributes significantly to overall efficiency and engine longevity. A well-maintained engine is an efficient engine.

Consider the “Sport” and “Sport Plus” modes with discretion. While exhilarating, these modes alter throttle mapping, transmission shift points, and exhaust characteristics to maximize performance, inevitably increasing fuel consumption. For calmer drives, leaving the car in its standard or “Comfort” mode will optimize efficiency.