BAC Mono X on Bring a Trailer Is Like an F1 Car for the Road
You’ll also want to bring a helmet.By Brendan McAleerPublished: Apr 6, 2025
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- The BAC Mono offers the single-seater experience for the road. The X model is the most powerful variant.
- It’s finished in a color scheme to match the Mercedes-AMG Petronas racing team.
- Fitted with racing derived parts from the best British specialists, it’s both a track star and a road car.
In the automotive world, single-seaters are usually restricted to closed course only performance, but in this case, we’ve got a street legal scorcher that truly offers a racecar experience for the road.
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This BAC Mono X, up for sale on Bring a Trailer (which, like Car and Driver, is part of Hearst Autos), is finished in a silver, black, and green combo that pays tribute to the AMG Petronas Formula 1 team. It only offers seating for one, and you’ll need to bring along your helmet, but it offers a supercar power-to-weight ratio in a package that’s smaller than the tiniest subcompact. It’s at once the ultimate track toy and also as close as you’ll get to a Formula 1 car for the road.
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The BAC initialism stands for Briggs Automotive Company, a specialist automotive design and engineering firm founded by two brothers in Liverpool at the end of the 2000s. After spending ten years working with the likes of Mercedes and Porsche, BAC struck out on its own with a wheels-up build of its own vehicle, the first Mono. Originally built around a Cosworth-fettled four-cylinder, it set multiple production-car records at several race tracks, and nearly tore Jeremy Clarkson’s face off on Top Gear.
This version, the Mono X, is even more ferocious. Powered by a 2.5-liter Ford-derived four-cylinder built by Essex-based touring car specialist Mountune, it pits 315 horsepower against just 1250 pounds, a lithe featherweight that makes even a Lotus Elise look like a Chevy Suburban.
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Speaking of Lotus, that Mountune engine is semi-structural, meaning that it’s akin to the stressed-member F1 cars Colin Chapman came up with in the 1960s. The gearbox is a six-speed sequential from Hewland, another British company with a long history of racing victory. Basically, this Mono X is like a best-of compilation featuring the UK’s heritage of men in sheds building absolute racing weapons.
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The bodywork is carbon fiber, the suspension is pushrod with adjustable Öhlins dampers, and the brakes are four-piston AP Racing calipers with steel rotors. The car sits on 17-inch alloy wheels fitted with Pirelli P Zero Trofeo R tires, and a second set of wheels fitted with Pirelli slicks for a dedicated track day is also part of the sale.
On the inside, the Mono X features a six-point safety harness and a fire-suppression system. Want driving tunes? Sing in your helmet.
Flying solo never looked like so much fun. Whether you’re looking for the ultimate track toy or a ultra-raw on-road experience for one, this Mono X is as pared back as driving gets. And, with just 1972 miles on the odometer, it’s just begging you to get your laps in.
The auction ends on April 10.
