This Four-Cylinder Engine Roars Up to 10,000 RPM | Carscoops

      Boreham Motorworks has created a naturally aspirated 2.1-liter engine that produces 325 hp for its Ford Escort RS restomod.

      Boreham's 2.1-liter four-cylinder engine features a billet crank and throttle bodies. This lightweight engine generates a total of 325 hp. Customers also have the option to select Boreham's Ford Escort RS equipped with a 1.8-liter engine.

      There is an undeniable allure in the craft of engine building. While many may admire large engine displacements, from Chevy’s 6.2-liter V8 to Bugatti’s astonishing 8.0-liter W16, there's an equally exciting aspect to smaller engines.

      An agile, high-revving, naturally aspirated four-cylinder that screams to five-digit RPMs possesses a unique charm, rooted in precision and boldness rather than just size.

      Among the small engines, Boreham Motorworks' new 2.1-liter engine is one of the most impressive we’ve seen.

      This four-cylinder engine is meant for Boreham's modern Ford Escort RS, first displayed late last year. After extensive and careful development, the company has unveiled its premier powertrain, which is exceptionally notable.

      Referred to as the Ten-K, this engine revs up to an incredible 10,000 rpm and produces 325 horsepower (330 PS / 243 kW), resulting in a specific output of over 155 hp per liter—an astonishing figure for a naturally aspirated 2.1-liter four-cylinder.

      For context, the current 4.0-liter flat-six in the Porsche 911 GT3 RS, often seen as a technological marvel, maxes out at “just” 9,000 rpm while generating 126 hp per liter.

      The specifications match the impressive figures. It features individual throttle bodies, a billet steel crankshaft, forged connecting rods, and a 16-valve configuration. Additionally, Boreham’s Ten-K is notably lightweight, tipping the scales at only 188 pounds (85 kilograms).

      Power is transmitted through a five-speed manual transmission with a dogleg pattern.

      The Ten-K isn't the sole option for Boreham’s revived Escort RS. The entry-level version boasts an updated version of the original Twin-Cam four-cylinder engine, expanded from 1,558 cc to 1,845 cc, now equipped with a contemporary fuel-injection system.

      This variant produces 182 horsepower and is matched with a four-speed straight-cut manual gearbox that channels power to the rear wheels.

      While it might appear to be a restomod, Boreham’s new RS is much more than just a reimagined classic. The vehicle is built entirely from new parts, with even the steel body panels newly crafted. Carbon fiber is utilized for the hood, trunk lid, and several interior components, keeping weight to a minimum.

      Upon completion of development, the Escort RS is anticipated to weigh around 1,763 pounds (800 kilograms), promising agility and responsiveness that should validate its high-revving potential—at least for those who can afford it.

      Only 150 units will be manufactured, with anticipated prices starting at approximately £295,000 or around $390,000 based on current exchange rates.