21 MPG combined for the 2019 Porsche 911 Turbo Cabriolet isn’t going to win any green awards, but that’s not the main goal. This machine is built for blistering performance, a car that trades economy for exhilarating speed and open-air thrills. It’s a trade-off its buyers willingly accept, perhaps even expect, when they purchase it.

City and highway performance

The EPA estimates 19 MPG in the city and 24 MPG on the highway for the 2019 911 Turbo Cabriolet, powered by its ferocious 3.8L flat-six engine. These figures represent the car’s ability to manage fuel consumption under different driving conditions. However, few owners are prioritizing fuel economy when experiencing the car’s potential. The city number reflects the inherent inefficiencies of stop-and-go driving, while the higher highway rating shows the engine’s efficiency at cruising speeds, relatively speaking. Even “cruising” in a Turbo Cabriolet often involves triple-digit numbers and frequent bursts of acceleration.

Annual fuel cost

The EPA estimates the annual fuel cost for the 2019 Porsche 911 Turbo Cabriolet at $2,750. This figure is based on driving 15,000 miles per year, with a specific percentage of those miles driven in city versus highway conditions.

The calculation assumes national averages for fuel prices, which fluctuate considerably. It’s a useful benchmark, but individual spending may vary depending on driving style and local fuel costs. More aggressive driving will predictably send that $2,750 figure soaring.

Real-world expectations

While the EPA provides a standardized measure of fuel efficiency, real-world MPG for the 2019 911 Turbo Cabriolet often differs. The Turbo’s performance-oriented nature inspires a more aggressive driving style that decreases overall fuel economy. Drivers who frequently exploit the engine’s capabilities will likely see numbers below the EPA estimates.

However, those who adopt a more conservative approach, and resist the urge to constantly tap into the immense power on tap, might approach or even slightly exceed the EPA figures, though it would arguably be missing the point of owning a car like this.

How it compares

Compared to its competitors, the 2019 911 Turbo Cabriolet occupies a unique niche. A Mercedes-AMG GT C Roadster, with its hand-built V8, delivers roughly similar levels of performance but manages only 15 MPG combined. The Audi R8 Spyder, while also offering all-wheel drive and impressive speed, posts figures around 16 MPG combined. These differences, while not insignificant, are less impactful at this price point. Buyers in this segment are typically more concerned with performance metrics and exclusivity than with maximizing less gas.

Those seeking better fuel economy from Porsche can explore 911 MPG across all years and models, but they will sacrifice the Turbo’s phenomenal power. For context, you can also review all Porsche fuel economy data across their entire model range to see how the 911 Turbo Cabriolet compares.

Tips to maximize efficiency

Even in a performance car like the 2019 911 Turbo Cabriolet, there are strategies to optimize fuel economy without entirely sacrificing the driving experience. Gradual acceleration is key; avoid aggressive launches and unnecessary bursts of speed. The 7-speed PDK transmission is remarkably efficient when left to its own devices in automatic mode, optimizing gear selection for economy when performance isn’t demanded.

Proper tire inflation is critical. Keeping tires at the recommended pressure reduces rolling resistance, improving MPG. Regularly check and adjust tire pressures, especially as temperatures fluctuate.

Reduce unnecessary weight. Carrying extra cargo adds to the vehicle’s burden and decreases fuel efficiency. Remove any non-essential items from the car to lighten the load.

Plan routes strategically. Avoid congested areas and routes with frequent stops and starts. Maintaining a steady speed on the highway is far more efficient than navigating stop-and-go traffic in the city, maximizing highway fuel economy.