The Mercedes-AMG GT 63 Pro and Porsche 911 GT3 offer two distinct visions of the modern sports coupé. One blends comfort with raw power, the other prioritizes pure driving connection. Here’s how they compare on road and track.
When the Mercedes-AMG GT 63 Pro arrives at the test center in Germany’s Eifel region, its presence is unmistakable. The deep rumble of its V8 hints at power, but the cabin’s comfort and technology suggest a car designed for more than just the racetrack. This is Mercedes’ answer to the question of whether a grand tourer can truly compete with a thoroughbred like the Porsche 911 GT3—a car that, for many, defines the very idea of a track-ready coupé.
Contrasts in Character
The AMG GT 63 Pro is a study in contrasts. While its predecessor, the GT R, was a raw, intimidating machine, the Pro version aims for a balance between daily usability and circuit performance. The seats are spacious, the infotainment screen dominates the dashboard, and only subtle details hint at its motorsport ambitions. Even the carbon-ceramic brakes and aggressive aero can be optioned on lesser AMG GT models, making it hard to distinguish the Pro at a glance.
Yet, beneath the surface, Mercedes has invested in serious hardware. The Pro features additional radiators for improved thermal management, manually adjustable coilover suspension, and carbon stabilizer bars. Rear-wheel steering and ceramic brakes come standard. The 4.0-liter twin-turbo V8 delivers 612 hp and 850 Nm of torque, but the car’s weight—at least 1,875 kg—means it carries a significant mass penalty over both its predecessor and the Porsche rival.
Porsche’s Purist Approach
The Porsche 911 GT3, by contrast, is unapologetically focused. Its naturally aspirated flat-six engine, paired with a lightning-quick PDK gearbox, creates a visceral driving experience. The cabin is stripped of excess insulation, amplifying every mechanical sound. After hours on the highway, comfort is clearly not the GT3’s priority—this is a car that demands engagement from its driver at all times.
Despite stricter safety and emissions regulations, Porsche has managed to keep the GT3’s weight low and its performance sharp. The price, however, has climbed: what once cost just over €170,000 now easily exceeds €200,000. With 102 hp and 400 Nm less than the AMG, the GT3 still matches its rival in real-world pace, thanks to its lighter chassis and more direct connection to the road.
On the Road and Track
Driving the GT3 is an immersive experience. The engine’s crescendo lingers long after the drive ends, and the steering communicates every nuance of the road. The car’s balance and feedback are so precise that only a Caterham might offer more information to the driver. Electronic aids work subtly in the background, keeping the car neutral and composed even at high speeds, while the rear-wheel steering and active differential help manage both understeer and oversteer with remarkable finesse.
The AMG GT 63 Pro, meanwhile, requires a different approach. Its technology suite offers a range of driving modes, from comfortable touring to aggressive track settings. The car’s weight distribution and all-wheel drive system mean that, while it can be intimidating at first, it becomes more rewarding as confidence builds. The steering is heavy, especially with wide 295 mm front tires, and the feedback is less immediate than in the Porsche. Yet, the AMG’s grip and stability allow even less experienced drivers to explore its limits safely, with modes tailored for every skill level—including a Drift mode that sends all 850 Nm to the rear wheels.
Different Strengths, Clear Identities
Where the GT3 thrives on demanding more from its driver, the AMG GT 63 Pro offers a broader spectrum of abilities. The Porsche is uncompromising in its pursuit of driving purity, making every journey an event but sacrificing comfort along the way. The Mercedes, on the other hand, is a technological powerhouse—capable of long-distance comfort and explosive performance, but less communicative and involving at the edge.
Ultimately, the AMG GT 63 Pro is not a direct rival to the GT3 in spirit. Its true competitor within the Porsche lineup is the 911 Turbo, another car designed for both road and occasional track use. The GT3 remains unique in its class, the last of its kind to offer a naturally aspirated engine and such a direct connection between driver and machine.
Verdict
The Porsche 911 GT3 secures the top spot for its unmatched driving engagement and authenticity, earning 4.5 out of 5 stars. The Mercedes-AMG GT 63 Pro, with its advanced technology and versatility, follows closely with 4 out of 5 stars—impressive, but ultimately less focused when it comes to pure driving pleasure.
