The heart of the Mono R is a bespoke 2.5 litre four-cylinder engine co-developed with Mountune. BAC and Mountune have left no stone unturned when it comes to meeting power targets: increasing the cylinder bore size and reducing new billet crankshaft stroke to optimise power and torque delivery and increase rpm from 7,800 rpm to 8,800 rpm.
The striking new Formula-inspired ram-air inlet system provides pressurised air into an all-new throttle body and cylinder head system to further increase power, plus a higher-spec, drive-by-wire motor allows for a quicker throttle response. As a result, the bespoke Mountune engine now offers 136bhp per litre – a new naturally aspirated global record for a road-legal model.