Ariel 4G Square Four Mark II

Introducing the 1954 Ariel 4G Square Four Mark II: A Classic Marvel The 1954 Ariel 4G Square Four Mark II, affectionately nicknamed the "Squariel," stands as a testament to mid-20th century motorcycle engineering, combining innovative design with robust performance. Crafted by the renowned British manufacturer Ariel, this motorcycle was positioned as an allrounder, appealing to riders seeking both everyday reliability and exhilarating speed. With its striking red and chrome finish, the Mark II captures the essence of classic motorcycling, making it a sought-after collector's item among enthusiasts and vintage riders alike. Engine Performance and Riding Dynamics At the heart of the 4G Square Four Mark II lies a 995cc square-four engine, delivering an impressive 45 horsepower at 5,500 RPM. This unique engine configuration not only provides a smooth and harmonious power delivery but also ensures a top speed of 160 km/h (99.4 mph), making it a formidable contender on both city streets and open roads. The 4-speed gearbox, paired with a chain final drive, allows for precise gear changes, enhancing the riding experience. Riders will appreciate the bike's power-to-weight ratio of 0.2332 HP/kg, which offers a spirited ride without compromising control. The air-cooled system, combined with a compression ratio of 6.0:1, ensures that the machine operates efficiently while remaining reliable in various conditions. Innovative Features and Technology The Ariel 4G Square Four Mark II is not just about performance; it also boasts several standout features that set it apart from its contemporaries. Designed by the legendary Edward Turner, the Mark II features separate barrels and a re-engineered cylinder head, which optimizes exhaust flow through four distinct pipes. This innovative design, along with a rocker-box integrated with the inlet manifold, enhances both power delivery and efficiency. The motorcycle’s tubular single-loop frame, coupled with oil-damped telescopic forks in the front and a plunger-link spring in the rear, provides a balanced and comfortable ride. Additionally, the drum brakes—203 mm at the front and 178 mm at the rear—offer reliable stopping power, ensuring safety without sacrificing style. **