Ariel 4G Square Four Mark I 1952 - Specifications & Review

Introducing the Ariel 4G Square Four Mark I: A Classic Icon of the 1950s

The 1952 Ariel 4G Square Four Mark I stands as a testament to the innovative spirit of post-war motorcycle engineering. Known affectionately as the "Squariel," this motorcycle carved a niche in the allround category, appealing to enthusiasts with its unique square four-cylinder engine design and distinct performance. Developed under the visionary eye of Edward Turner, the Mark I exemplifies the blend of style, power, and versatility that characterized the golden age of motorcycling. With its striking aesthetics available in vibrant red and chrome or classic black and chrome, the Ariel 4G is not just a machine; it’s a piece of art that commands attention on the road.

Engine Performance and Riding Characteristics: The Heart of the Beast

At the core of the Ariel 4G Square Four Mark I lies a robust 995cc square four-cylinder engine, producing a respectable 35 horsepower at 5,500 RPM. This power translates to a thrilling top speed of 144.8 km/h (90 mph), making it a capable performer for both spirited rides and leisurely cruising. The engine's 6.0:1 compression ratio and air-cooled design ensure reliable performance even during extended journeys. Riders will appreciate the smooth power delivery through its 4-speed gearbox, complemented by a chain final drive that provides a dynamic riding experience. The bike's weight of 197 kg (434.3 pounds) gives it a balanced feel, instilling confidence whether navigating through urban streets or taking on winding country roads.

Key Features and Technology: Innovation Meets Classic Design

The Ariel 4G is not just about raw power; it also features advanced technology for its time. Its tubular single-loop frame offers both strength and lightness, while the oil-damped telescopic front forks and plunger-link rear suspension ensure a comfortable ride, even on less-than-perfect roads. Braking is handled by expanding drum brakes, with a generous diameter of 203 mm at the front and 178 mm at the rear, providing adequate stopping power that matches its spirited performance. The iconic design, combined with a fuel capacity of 16 liters (4.23 gallons), makes the Mark I an ideal choice for those seeking a blend of style and practicality on long rides.

Pros and Cons of the Ariel 4G Square Four Mark I

Pros:

1. Unique Engine Design: The square four-cylinder layout not only offers distinctive aesthetics but also contributes to smooth power delivery and an engaging riding experience.
2. Comfortable Suspension: The oil-damped telescopic front forks and plunger-link rear suspension provide excellent handling and comfort over varying road conditions.
3. Classic Appeal: With its vintage styling and iconic status, the Ariel 4G attracts attention and admiration wherever it goes, making it a standout choice for classic motorcycle enthusiasts.

Cons:

1. Weight: At 197 kg, the bike may feel heavy for some riders, particularly in tight maneuvers or during low-speed handling.
2. Drum Brakes: While adequate for its time, the expanding drum brakes may lack the stopping power and feel of modern disc brakes, requiring careful modulation.
3. Limited Performance by Today’s Standards: Despite its impressive specifications for the era, modern motorcycles can easily outperform the Mark I in terms of speed and handling, making it more suited for leisurely rides than aggressive sport riding.

In conclusion, the 1952 Ariel 4G Square Four Mark I is a remarkable piece of motorcycle history that combines classic aesthetics with innovative engineering. Whether you’re a collector, a vintage motorcycle enthusiast, or someone who appreciates the charm of mid-20th century design, the Squariel promises a delightful ride that resonates with the spirit of adventure.