Introducing the Boreham TEN-K, A Race-Bred, Lightweight Powerhouse for the Road

12/11/2025 Media Enquiries: Rob Borrett | +44 (0) 7436 207851

Press Releases

Boreham TEN-K: a bespoke 85kg, 2100cc inline-four engineered to achieve 330PS at 10,000rpm

Utilises lightweight internals and billet components for optimal vehicle dynamics and engine performance

Individual throttle bodies and naturally aspirated with a 16-valve head featuring F1 inspired port geometry to maximise gas flow and response

Dyno testing, calibration and on road testing underway, with power already exceeding targets

Coventry, UK – 12th November, 2025.

Introducing the Boreham TEN-K – a bespoke, high-performance 2100cc inline-four with individual throttle bodies and lightweight internals, developed by Boreham Motorworks to power the next generation Ford Escort Mk1 RS. Naturally aspirated and engineered to deliver 330PS at 10,000rpm, it offers razor-sharp response and linear power. 

A motorsport derived belt driven twin-cam with modern electronics (internal development code BD10-330), the Boreham TEN-K blends unfiltered performance with cutting-edge control. Built with lightweight internals and billet components – including the crank, rods, cradle, dry sump and cam cover – it delivers fast, direct throttle response. A 16-valve head with F1-inspired port geometry optimises gas flow and power delivery. Weight has been meticulously reduced throughout to enhance vehicle dynamics and engine performance capability. Further weight savings were found by using thin wall 3D printed casting technology, which enables a sculpted engine block, formed closely around the internal components. The result is an engine that weighs just 85kg (as photographed for this release). 

Significant dyno testing and calibration have been completed over the past six months, with results exceeding development goals for performance. Power and Rev limit are already above initial targets with immediate and direct throttle response – a testament to the precision of the low-inertia lightweight internals.

“We’ve reached a hugely important milestone in the Mk1 RS programme,” said Iain Muir, CEO of DRVN Automotive. “The Boreham TEN-K is the result of relentless effort from our engine development team – a demonstration of what can be achieved when passion and precision come together. With the engine being currently installed in the car and mated to the bespoke, all-new, ultra-light weight fully floating rear axle I can’t wait to see it fired up for its first test run.” 

The engine programme is led by Simon Goodliff, CTO of DRVN Automotive Group, and Laine Martin, Head of Powertrain. Together, they bring over 30 years of leadership in Ford powertrain development. Simon previously served as Chief Engineer at Ford Motor Company, playing a pivotal role in the creation of powertrain systems across multiple global products. Laine was formerly Manager of Ford Engine Calibration and Control Systems, and has been instrumental in shaping engine character and responsiveness across the Ford portfolio.  

10,000RPM. Zero Compromise. 