The McMurtry Spéirling: Redefining Automotive Performance

The McMurtry Spéirling, an all-electric single-seater, has fundamentally disrupted the high-performance automotive landscape. Its name, Irish Gaelic for "thunderstorm," aptly describes its dramatic arrival at the 2022 Goodwood Festival of Speed. There, it shattered the 1.16-mile hillclimb record with a time of 39.08 seconds, eclipsing benchmarks set by both a Formula 1 car and the purpose-built Volkswagen ID.R electric prototype. This achievement was not just a new record; it was the validation of a radical design philosophy that champions lightweight efficiency over the brute force of contemporary electric hypercars.

The Spéirling is the culmination of the engineering ethos of the late Sir David McMurtry, co-founder of the engineering firm Renishaw and a former Rolls-Royce aerospace engineer. Founded in 2016, McMurtry Automotive was established to challenge the industry's trend toward increasingly heavy vehicles. The company’s mission was to resurrect and perfect a controversial, long-banned motorsport technology: the fan car. By developing the car in secrecy for over three years, the team created a machine that represents a paradigm shift, proving that a lighter, more aerodynamically advanced approach can triumph over sheer power and mass.

At the heart of the Spéirling's revolutionary performance is its patented Downforce-on-Demand™ system. Twin electric turbines spool up to 23,000 rpm, evacuating air from underneath the car to create a powerful vacuum. This generates a staggering 2,000 kg of downforce from a standstill—more than double the car's sub-1,000 kg weight. Unlike conventional aerodynamics, which are speed-dependent, this grip is always available, enabling incredible cornering forces exceeding 3g. Crucially, the system is active and tunable; the fans can be switched off on straightaways to reduce drag, improving efficiency and top speed. This "on-demand" capability is the key to the Spéirling's "virtuous circle" design. Because immense grip is not tied to speed, the car can be made dramatically smaller and lighter. This reduces the need for a large, heavy battery, which in turn allows for a lighter chassis and components, creating a feedback loop of mass reduction and efficiency.

The powertrain consists of two electric motors driving the rear wheels, producing 1,000 bhp. This gives the Spéirling a power-to-weight ratio superior to that of a Bugatti Chiron. The 800-volt, 60 kWh battery is ingeniously packaged in a U-shape within the carbon-fibre monocoque, keeping the center of gravity exceptionally low. The car's diminutive footprint—closer in size to a 1960s Grand Prix car than a modern hypercar—is a direct result of this philosophy, minimizing frontal area and aerodynamic drag.

The Spéirling's performance has been validated through a systematic campaign of record-breaking. It achieved a 0-60 mph time of around 1.4 seconds and a quarter-mile in 7.97 seconds, faster than the official production car record. Beyond Goodwood, it has set outright lap records at numerous iconic venues, including the Top Gear Test Track, where it beat a V10-powered Formula 1 car's 21-year-old benchmark. At Germany’s Hockenheimring, it was over 14 seconds faster than the Mercedes-AMG One hypercar, despite running at only 75% of its potential. The ultimate demonstration of its technology came in April 2025, when the Spéirling successfully drove while fully inverted, held to a platform solely by its own aerodynamic force—a world-first feat that proved its downforce exceeds its weight and is available at zero speed.

Following this success, McMurtry announced a limited production run of 100 track-only customer cars, the Spéirling PURE. Priced at over $1.1 million, the PURE is an evolution of the prototype, featuring more efficient fans, a higher 190 mph top speed, wider tires for increased mechanical grip, and improved endurance for sustained lapping on Grand Prix circuits.

The Spéirling's existence forces a re-evaluation of performance car engineering. In comparisons, it has gone toe-to-toe with the 1,914 hp Rimac Nevera in drag races and has consistently bettered F1 cars on certain tracks, showcasing the immense potential of unregulated design. By perfecting fan car technology, McMurtry has not only created an exclusive track weapon but has also presented a compelling argument against the "bigger and heavier" trend. Its success has reopened a chapter of engineering history, prompting even Formula 1 to reconsider active aerodynamics. The Spéirling is a landmark vehicle that proves a smarter, lighter, and more efficient approach can redefine the very concept of speed.