When enthusiasts ask what is the fastest Infiniti car, the answer requires looking beyond marketing claims and into the heart of performance engineering. For years, Infiniti, the luxury division of Nissan, has balanced silky-smooth powertrains with attainable everyday usability, often favoring comfort over outright track aggression. However, within their model lineage lies a handful of machines that were engineered to dominate both the highway and the winding road. To identify the peak of their performance hierarchy, one must examine the precise calibration of power, aerodynamics, and handling that defines true speed.
Defining the Performance Peak: The Q50 Red Sport 400
For the longest time, the title of fastest Infiniti was held by the Q50 Red Sport 400, a model that arrived as a serious contender in the sport sedan arena. Slotted above the standard Red Sport, the 400 designation signaled a significant leap in capability, moving beyond the 300-horsepower baseline. This model didn't just offer a louder engine; it delivered a complete performance package designed to tame that power effectively. The result was a factory-bred machine that could outperform many of its German competitors in real-world driving scenarios, making it the benchmark for years.
Power and Precision: The Engineering Behind the 400
The heart of the Q50 Red Sport 400 is a twin-turbocharged 3.0-liter V6, a piece of machinery that produces 400 horsepower and an impressive 480 lb-ft of torque. This power is channeled to the rear wheels through a seven-speed automatic transmission with paddle shifters, providing lightning-fast shifts and precise control. The engineers at Infiniti didn't stop there; they fortified the drivetrain with a limited-slip differential, ensuring that power is delivered to the ground with maximum efficiency, especially during aggressive cornering or acceleration.
The Track-Ready Challenger: Q60 Project Black S
While the Q50 Red Sport 400 dominated the streets, the Q60 Project Black S represented the absolute zenith of Infiniti's performance ambition, arriving as a limited-production halo car. This vehicle was not just about raucous power; it was a rolling laboratory of technology, borrowing directly from Formula 1 to deliver an experience that was as exotic as it was accessible. For those seeking the answer to what is the fastest Infiniti car in a production sense, the Project Black S was the definitive answer, albeit one wrapped in exclusivity and steep pricing.
Formula 1 DNA and Raw Output
The Project Black S distinguished itself with a visually aggressive design language, featuring a fixed carbon fiber rear wing and an active grille shutter system that closed at speed to reduce drag and opened to feed the brakes. Under the hood, it housed the same 3.0-liter twin-turbo V6 as the Q50, but with significant enhancements that pushed output to a staggering 545 horsepower and 549 lb-ft of torque. This surge in power, combined with the Q60 coupe's inherently rigid chassis, allowed the Black S to sprint to 60 mph in just 3.5 seconds, a figure that placed it among the quickest luxury sports cars of its era.
Comparing the Contenders: Q50 vs. Q60
Choosing between the Q50 Red Sport 400 and the Q60 Project Black S depends largely on the context of the question. If the query is about the fastest car that Infiniti offered more broadly, with available trims for the public, the Q50 Red Sport 400 takes the crown for its balance of speed, comfort, and usability. However, if the question is strictly about peak performance and engineering showcase, the Q60 Project Black S is the undisputed champion. Both cars utilize the same core engine technology but apply it with different philosophies and goals.
