You know when Homer Simpson encounters a donut, and Pavlov's himself into drool mode for a moment of treat-triggered titillation? The upper third of the tachometer of any 911 wearing the GT3 badge has a similar effect on the brain of the driving enthusiast. With a great big flat six engine that works best when it's spinning fast, it's not short on lusty sound effects, either.Open-topped models powered by the fastest-revving Porsche flat-six around have typically been very scarce, though the automaker has taken the wraps off a solution that'll let GT3 drivers ditch the top at a button press.It comes in the form of a new 911 GT3 variation called the Sport Cabriolet, or 911 GT3 S/C for short. It'll be part of the standard 911 lineup, instead of coming along every so often as a limited-edition affair. This three-pedal, four-liter, 500-horsepower, 9000-RPM thrill ride comes with a $273,000 asking price, $32,700 more than the fixed-roof GT3 if you're counting. According to Porsche, you'll do 0–60 in 3.7 seconds en route to a top-down top speed of 194 mph in the new GT3 S/C. How's that compare to the fastest roof-optional Porsches ever made? Read on.The list below is ranked from slowest to fastest by top speed. All top speeds are sourced from the manufacturer. Individual testing results may vary. Porsche 718 Spyder / RS / Boxster Spyder 180-191 MPH 2024 Porsche 718 Spyder Weissach Package rearThe Porsche 718 Spyder and Boxster Spyder before it were ultra-light, purist-focused variations of the more mainstream convertible models that helped put Porsche on the map as a source for mid-engine drop-top fun. High-revving and naturally aspirated, these lightweight drop-tops have appeared at various points throughout history, most recently with the ultimate RS model, which was discontinued only recently.These machines feature extremely athletic chassis tuning and a fully manual roof that needs to be installed and tensioned by the driver in the name of weight reduction. This minimalist roof operates more like an 'emergency top' if drivers get caught in the rain. With the roof down, you'll hear even more of the screaming revs and snarling intake of the mid-mounted flat-six. These stripped-back RS models are capable of cracking 191 mph, while earlier non-RS models topped out anywhere between 180 and 187 mph. 2026 Porsche 911 Carrera S Cabriolet 191 MPH 2025 Porsche 911 Carrera S Cabriolet (3)This particularly friendly 911 configuration has evolved over generations to deliver more power, more efficiency, and increased top speeds. The latest 911 Carrera S Cabriolet can hit 191 MPH with enough room, approaching supercar territory when it comes to terminal velocity. That's while delivering an everyday-comfortable drive that's approachable and fuel efficient, especially at more reasonable speeds. This 911 is all about balancing speed, power, and precision with a comfortable drop-top experience that's easy to enjoy on virtually any trip. The roof mechanism is fully motorized, can be operated while the car is rolling in low-speed traffic, and takes about 12 seconds to complete its work.These days, you'll find a 3-liter flat-six twin-turbo engine between the rear wheels, and no shortage of options and packages for customization. Notably, improved materials and design have improved rigidity and weight performance of the 911's convertible models for generations, and the latest convertible models pose less compromise than ever to stiffness and weight. Top down, drivers can soak in even more of those wooshy turbocharged flat-six sound effects. 2026 Porsche 911 Carrera GTS Cabriolet 194 MPH 2025 Porsche 911 Carrera GTS Cabriolet (1)Several generations of Porsche 911 Carrera GTS Cabriolet have come and gone, each faster than the one before it. The latest version is the first production car with Porsche's lightweight T-hybrid system, featuring an electrically-driven turbocharger and in-transmission electric motor as key performance enhancements. Look for 0–60 in 3 seconds, and a 194 MPH top speed achieved not too long after, provided you've got enough room.The muscular GTS model range has long been the sweet spot for 911 fans after a high-value package geared towards the enthusiast driver, and the latest convertible variation builds on the appeal with the latest tech and best-yet performance metrics. This grade typically includes standard-kit performance goodies optional elsewhere in the 911 lineup. The latest 911 GTS Cabriolet also benefits from a revised chassis, upgraded cooling, and recalibrated aerodynamics that help it sustain high speeds with less stress on the driver and hardware. 2026 Porsche 911 Turbo S Cabriolet 200 MPH 2026 Porsche 911 Turbo S Cabriolet (1)The Turbo and Turbo S configurations of the Porsche 911 have always been the mightiest, and each has been offered in a convertible configuration for years. Porsche engineers each subsequent 911 range to make big advancements over the ones before it, so it's no surprise the latest 911 Turbo S Cabriolet tops out at 200 MPH.The latest version not only uses a potent new electric turbocharger technology to improve response, plus it also features advanced aerodynamics. That's all matched by the latest in Porsche chassis wizardry and damper technology, as well as improved cooling capabilities which no doubt help in sustained periods of full-throttle, high-speed use. Though it has a tremendous appetite for pavement and enough torque to deliver on-demand facelifts to all occupants, it also runs AWD as standard, as well as adjustable dampers for added confidence and peace of mind. 2003 Porsche Carrera GT 205 MPH Porsche Carrera GTOn its original-spec tires, the 5.7-liter V10 in the middle of the Porsche Carrera GT could whisk its horrified driver to 60 MPH in 4 seconds, with a 205 MPH top speed greeting the bravest drivers, while leaving a LeMans-inspired shriek in its wake. Known for being one of the most demanding and visceral supercars ever built, the Carrera GT was one of those super-Porsches that only comes along every so often to inject a new generation of technological DNA into the brand's gene pool.When it launched in 2003, the highly exclusive and famously unforgiving Carrera GT used every exotic engineering implement and lightweight tweak in Porsche's recipe book at the time, and it remains their second-fastest convertible, even 23 years later. Don't expect this rolling showcase of period engineering to fade from automotive folklore any time soon. The roof was a simple ordeal, comprised of two carbon-fiber panels that could be manually removed and stored when drivers felt like unlimited headroom, or unfiltered access to that one-of-a-kind V10 soundtrack. With its first convertible supercar, Porsche's long-running pursuit of structural and aerodynamic performance went hand-in-hand with developing a high-performing drop-top experience. 2013 Porsche 918 Spyder 214 MPH 2013-2015 Porsche 918 Spyder Silver Front Angled ViewThe fastest production convertible Porsche ever built is also the only entry on our list with a plug. A spiritual successor to the Carrera GT, the 918 Spyder came along a decade later with a new dose of engineering upon which future models would draw. This time around, the focus was on downsizing and electrification. In an era where many shoppers were apprehensive about hybrids, the 918 Spyder embraced the technology, Porsche style.The resulting machine got a smaller 4.6-liter V8 engine, boosted by two electric motors. Output for this Plug-In Hybrid approached 900 horsepower, and AWD ensured a fast start. For silent cruising, all-electric operation was possible on shorter trips at the flick of a dial. That same dial also accessed 'Qualification Mode' on the 918 Spyder's drive mode selector, a first for Porsche.With all systems dialed in, you're clear for 214 miles per hour and an endless torrent of revs, noise, and torque as your constant companion. The roof was a similar setup to the Carrera GT before it: lightweight and fully manual. With exhaust outlets aimed upwards and positioned right behind the passenger compartment, unfettered access to that all-motor V8 bark is yours for the taking.Sources: Porsche
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