A naturally aspirated engine running at 10,000 rpm? Boreham did it. See how the Ten-K delivers 325 hp in the new Ford Escort Mk1 RS.
The passion for classic automotive icons has never been more alive. Boreham Motorworks has just unveiled a true engineering jewel: the Boreham Ten-K engine, a 2.1-liter four-cylinder block that delivers 325 horsepower without any turbochargers, blending tradition and cutting-edge technology for the US market.
The Boreham Ten-K Engine: A Powerful Naturally Aspirated Four-Cylinder
Automotive engineering and innovation go hand in hand in Boreham Motorworks’ design. The Ten-K is born to challenge the industry status quo, which increasingly relies on turbocharged engines to extract power. With an impressive 10,000 rpm redline, the engine delivers 325 horsepower while maintaining natural aspiration—an achievement that excites motorsport purists across the USA.
| Specification | Details |
|---|---|
| Configuration | 4 inline cylinders, 16 valves, DOHC |
| Displacement | 2.1 Liters |
| Maximum Power | 325 hp @ 10,000 rpm |
| Weight | 85 kg (approx. 187 lbs) |
| Induction | Naturally aspirated with individual throttle bodies (ITBs) |
The extensive use of billet materials for the crankshaft and other internal components increases strength and reduces weight. Additionally, the F1-inspired truss geometry ensures optimal gas flow, guaranteeing the engine breathes with maximum efficiency at high revs for peak American performance.
Ford Escort Mk1 RS Boreham: A Modernized and Exclusive Classic for Enthusiasts
Boreham Motorworks is bringing back the Ford Escort Mk1 RS officially and licensed by Ford, with a project that combines classic aesthetics and the highest technology of the Ten-K engine. Weighing less than 816 kg (approx. 1800 lbs), the model promises a power-to-weight ratio that even the most demanding US collectors will find impressive.
With prices starting at £295,000 (approximately $380,000 USD at current exchange rates), Boreham’s continuation Escort offers two engine options for different profiles:
- Premium Version: Boreham Ten-K 2.1L engine with 325 hp + 5-speed manual transmission
- Standard Version: 1.85L twin-cam engine with 185 hp + 4-speed manual transmission
The focus on handcrafted construction and premium details makes this vehicle a true collector’s piece, aimed at lovers of mechanics and authentic performance seeking high-end classic imports.
Cutting-Edge Technology and Purist Philosophy in Performance Engines
Boreham Motorworks’ deliberate choice of a purely naturally aspirated engine with optimized valve geometry is a statement against the growing dependence on turbochargers. This approach offers not only an unmistakable growl but also instant engine response—valued by true motorsport enthusiasts in North America.
Furthermore, manufacturing with 3D printing in the casting process allows for a drastic weight reduction without compromising structural integrity. As a result, the Boreham Ten-K weighs only 85 kg (187 lbs)—a remarkable number that reinforces its competitive character for track days and shows.
Enthusiasts seeking to deepen their technical knowledge can benefit from a detailed analysis of why 4-cylinder turbo engines dominate the current market. For those who appreciate the union of tradition and modern performance, the Ford GT 2026 project presents another example of technology and power.
In summary, Boreham’s Escort Mk1 RS with the Ten-K engine is a technological tribute to the past, elevating the driving experience to almost artisanal levels, where each part was designed to accelerate and enchant classic car lovers.
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If you’re a fan of exceptional engines and automotive history, you’ll surely be fascinated by the revolution Boreham has brought to the high-performance classic vehicle market in the US and globally.
