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Ariel 4G Square Four 1000
1938Allround

Ariel 4G Square Four 1000

Key specifications

Engine
997 cc
Power
35 HP
Weight
193 kg
Fuel type
petrol
Fuel capacity
6.1 L
Transmission
4-speed
Front brakes
Expanding brake (drum brake)
Rear brakes
Expanding brake (drum brake)

Overview

The 1938 Ariel 4G Square Four 1000, affectionately known as the 'Squariel,' stands as a testament to the innovative spirit of pre-war motorcycle engineering. Positioned within the allaround category, this motorcycle seamlessly marries classic styling with advanced technical prowess for its time. Ariel, a revered name in the motorcycle world, aimed to capture the hearts of both casual riders and performance enthusiasts alike. The 4G Square Four not only embodies the elegance of the late 1930s but also represents a significant leap in motorcycle design, making it a sought-after piece for collectors and riders who appreciate history on two wheels. At the heart of the Squariel lies a distinctive square four-cylinder engine, boasting a displacement of 997 ccm and generating a respectable 35 HP at 5500 RPM. With a compression ratio of 6.0:1 and a top speed of 140 km/h (87 mph), this motorcycle excels in delivering a smooth, powerful ride. The unique configuration of the engine contributes to a refined balance and vibration reduction, making long journeys enjoyable. Coupled with a four-speed gearbox and chain final drive, the riding characteristics of the Square Four are characterized by responsive acceleration and effortless cruising. Riders will appreciate the blend of power and agility that allows for both city commuting and open-road adventures. The 1938 Ariel 4G Square Four showcases several key features that underline its engineering excellence. Its tubular single-loop frame provides strength while keeping the overall weight manageable at 193 kg (425.5 pounds). The combination of telescopic front forks and a plunger-link rear suspension ensures a balanced and comfortable ride, capable of soaking up road imperfections with ease. Safety is addressed through reliable expanding drum brakes at both the front and rear, enhancing stopping power and rider confidence. With a fuel capacity of 23 liters, the Squariel is designed for longer journeys, making it a practical choice for riders looking to explore the open roads in style. In summary, the 1938 Ariel 4G Square Four 1000 is not just a motorcycle; it's a piece of history that embodies the charm and craftsmanship of its era. Whether you’re an avid collector or a rider who appreciates the vintage allure, the Squariel promises a unique blend of nostalgia and performance that stands the test of time.

Pros

  • Unique Engine Configuration: The square four-cylinder engine design offers a smooth and powerful ride, delivering impressive performance and lower vibrations.
  • Comfortable Suspension: The combination of telescopic forks and plunger-link rear suspension provides excellent handling and comfort over various terrains.
  • Classic Aesthetic Appeal: The striking red and white color options coupled with vintage styling make the Squariel a head-turner, perfect for classic motorcycle enthusiasts.

Cons

  • Limited Power Output: With only 35 HP, it may not satisfy riders looking for extreme performance compared to modern standards.
  • Heavier Weight: At 193 kg, it can feel cumbersome for some, particularly in tight or technical riding scenarios.
  • Kick Start Only: The absence of an electric start can be a drawback for some riders, especially in challenging conditions or for less experienced motorcyclists.

Technical details

Source specification data

Make
Ariel
Model
4G Square Four 1000
Category
Allround
Starter
Kick
Comments
Also called ´Squariel´.
Color Options
Red/white
Power
35.00 HP (25.5 kW)) @ 5500 RPM
Gearbox
4-speed
Top Speed
140.0 km/h (87.0 mph)
Engine Type
Double twin cylinder arranged as a square
Fuel System
Carburettor. SU MC2 carburettor
Bore X Stroke
65.0 x 78.0 mm (2.6 x 3.1 inches)
Compression
6.0:1
Displacement
997.00 ccm (60.84 cubic inches)
Cooling System
Air
Engine Details
Square four cylinder
Valves Per Cylinder
2
Transmission Type Final Drive
Chain
Dry Weight
193.0 kg (425.5 pounds)
Fuel Capacity
23.00 litres (6.08 gallons)
Overall Length
2,083 mm (82.0 inches)
Power Weight Ratio
0.1813 HP/kg
Wheels
Wire spoked
Rear Tyre
4.00-18
Frame Type
Tubular single loop
Front Tyre
3.25-19
Rear Brakes
Expanding brake (drum brake)
Front Brakes
Expanding brake (drum brake)
Rear Suspension
Plunger-link spring
Front Suspension
Telescopic fork
Rear Brakes Diameter
178 mm (7.0 inches)
Front Brakes Diameter
203 mm (8.0 inches)

Available colors

Red/white