BAC has officially unveiled the generation two version of its fully road-legal Mono single-seater supercar.
The new Mono ‘R’ is 35 bhp more powerful and 25 kg lighter than the previous model, at 340 bhp and 555 kg – equating to a power-to-weight ratio of 612 bhp-per-tonne.
Co-developed with long-standing engine partner Mountune, the R’s 2.5-litre, four-cylinder unit gets an enlarged cylinder bore size and reduced new billet crankshaft stroke to optimise power and torque delivery and increase rpm from 7,800 rpm to 8,800 rpm.
The new F1-inspired ram-air inlet system provides pressurised air into an all-new throttle body and cylinder head system to further increase power, plus a drive-by-wire motor allows for a quicker throttle response.
As a result, the bespoke Mountune engine now offers 136 bhp per litre – which is being claimed to be a new naturally aspirated global record for a road-legal model.
Elsewhere, magnesium chassis and transmission components combine to reduce mass and improve weight distribution, while new carbon-ceramic brakes – which save 2.55 kg of unsprung mass per corner – are fitted as standard.
Further lightweighting measures include a new titanium exhaust system, lighter AP Racing brake calipers and an all-new carbon floor.
Externally, all of the car’s surfaces have been designed from scratch and 44 bespoke carbon parts restyled to give it “a more aggressive, organic and futuristic stance”.
BAC’s designers say the R has been the subject of numerous aerodynamic enhancements, with more efficient front arches and wider sidepods as well as a larger and more aerodynamically efficient rear spoiler extending over the rear arches. Plus there’s been a 20 mm reduction in overall height and a 25 mm increase in length over the standard Mono.
Additional details include new LED lights, twin-strut wing mirrors, a rear crash box and a narrower tail incorporating new LED combination fog and reverse lights.
Inside, there’s a new, race-inspired look, complete with lighter steering wheel and optional carbon interior side panels.
A total of just 30 R models are being produced – all of which are sold out worldwide, according to the Liverpool-based company.