17 MPG combined. No one buys a 2021 Porsche 911 Turbo expecting Prius-like fuel economy. It is a machine engineered for breathtaking performance, designed to dissect apexes with ferocious speed. The compromise for that level of capability comes at the pump. The 911 Turbo buyer isn’t prioritizing efficiency; they’re pursuing an experience, a visceral connection to the road that few other cars can offer. Gas mileage is a secondary consideration, a price of admission to 911 Turbo ownership.

City and highway performance

The EPA estimates the 2021 Porsche 911 Turbo at 15 MPG in the city and 20 MPG on the highway. The city figure reflects stop-and-go traffic, where the 3.7L twin-turbocharged flat-six engine spends more time idling and accelerating than cruising. The highway number is more acceptable, but even at a steady 70 mph, the 911 Turbo’s power is readily available, tempting drivers to tap into the boost and reduce their fuel economy. The eight-speed automatic transmission (AM-S8) is geared for performance rather than maximum efficiency. Ultimately, these numbers are from standardized tests, and may stray from your personal average.

Annual fuel cost

According to the EPA, the annual fuel cost for the 2021 Porsche 911 Turbo is $3,400. 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 uses the national average fuel price, which fluctuates. That $3,400 is more than some people spend on rent in a year. Anyone able to afford a 911 Turbo can likely absorb this expense. It’s a factor, but rarely a deciding one.

Real-world expectations

Expect your actual fuel economy to fall below the EPA estimates. The 911 Turbo encourages aggressive driving, and repeated bursts of acceleration will deplete your fuel tank. Track days and spirited weekend drives will also significantly impact your MPG. Those who primarily use their 911 Turbo for long highway cruises, using a light foot on the accelerator, may see figures closer to or even slightly above the EPA highway estimate. However to obtain that result you may have to resist the temptation to accelerate from 70mph. A more likely range is 14-19 MPG in mixed driving.

How it compares

The 911 Turbo isn’t competing with hybrids for lower fuel costs. For example, the Jaguar F-Type R earns a combined 18 MPG with its supercharged V8. The BMW M8 Competition Coupe achieves a similar 17 MPG combined. These vehicles offer a similar blend of performance and luxury, so fuel economy could be a tie-breaker for some buyers. For those seeking slightly better efficiency, the standard 911 Carrera models offer improved MPG, though with a corresponding decrease in horsepower. You can also view 911 MPG across all years on our site. To find out more about the Porsche lineup, including SUVs, you can see all Porsche fuel economy data on our website.

Tips to maximize efficiency

Avoid excessive idling. The 911 Turbo’s engine is thirsty, even at idle. If you’re stopped for more than a minute, shut it off. Porsche’s auto start/stop system can assist with stopping excessive idling in certain situations.

use the Porsche Intelligent Performance (PIP) system. This system optimizes various engine and transmission parameters for improved fuel efficiency. While it may slightly reduce throttle response, it can help you achieve better MPG during low-demand driving situations.

Monitor your tire pressure. Underinflated tires increase rolling resistance, which negatively impacts fuel economy. Ensure your tires are properly inflated to the recommended pressure, found on a sticker inside the driver’s side doorjamb.

Resist the urge to unleash the turbochargers at every opportunity. While the 911 Turbo’s power is addictive, frequent heavy acceleration will decimate your fuel economy. Practice smooth throttle inputs and anticipate traffic flow to minimize unnecessary acceleration.

Consider a less aggressive driving mode when appropriate. When the roads are unfavorable or you are driving in heavy traffic situations, drive in a comfort mode. This might prevent you from being sucked into stop-and-go situations.