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Ariel 4G Square Four 1000
1947Allround

Ariel 4G Square Four 1000

Key specifications

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

Overview

Introducing the 1947 Ariel 4G Square Four 1000 Step back in time to the post-war era when motorcycling began to flourish, and meet the 1947 Ariel 4G Square Four 1000, a motorcycle that elegantly encapsulates the spirit of innovation and adventure. Often affectionately referred to as the 'Squariel', this allround marvel was designed by the brilliant Edward Turner, a name synonymous with motorcycle design excellence. The 4G Square Four carved a niche for itself in the market, appealing to both enthusiasts seeking a unique riding experience and everyday riders looking for reliability and versatility. Its distinctive square four-cylinder engine, coupled with classic styling, makes it a standout choice for collectors and vintage bike aficionados alike. Engine Performance and Riding Characteristics At the heart of the Ariel 4G is its impressive 995 cc square four-cylinder engine, delivering a robust 35 horsepower at 5,500 RPM. This power enables the bike to reach a top speed of 140 km/h (87 mph), offering an exhilarating ride that competes with many contemporary motorcycles of its time. The 6.0:1 compression ratio and the sophisticated SU MC2 carburettor fuel system allow for smooth throttle response and a satisfying ride, whether cruising along the open highway or navigating through city streets. The 4-speed gearbox provides seamless gear transitions, ensuring riders can effortlessly tackle various terrains while enjoying the bike’s comfortable plunger-link rear suspension and oil-damped telescopic front forks. Key Features and Technology The Ariel 4G Square Four is not just about raw power; it also boasts a well-thought-out design that enhances both performance and comfort. The tubular single-loop frame contributes to the motorcycle's rigidity and stability, while the expanding drum brakes—203 mm at the front and 178 mm at the rear—provide reliable stopping power. With a weight of 211 kg (465 lbs), the bike strikes a balance between heft and maneuverability, making it a joy to handle on both short commutes and long rides. The 23-liter fuel tank ensures that riders can enjoy extended journeys without frequent refueling stops, adding to the bike's allround capability. Available in stunning black and silver, the 4G Square Four's aesthetic is as striking as its engineering. **

Pros

    Cons

    • Unique Engine Design: The square four-cylinder engine offers a distinctive sound and smooth power delivery that sets it apart from typical parallel or V-twin engines.
    • Classic Styling: The Ariel 4G's vintage aesthetic appeals to enthusiasts and collectors, making it a timeless piece of motorcycle history.
    • Comfortable Ride: The combination of plunger-link rear suspension and telescopic front forks provides a comfortable and stable ride, ideal for longer journeys.
    • Weight: At 211 kg, the 4G Square Four may feel cumbersome for some riders, particularly those accustomed to lighter modern motorcycles.
    • Drum Brakes: While effective, the drum brake system may not provide the same level of stopping power or responsiveness as contemporary disc brakes.
    • Kick Start Only: The absence of an electric starter may be a drawback for some riders, particularly in modern traffic situations where ease of starting is a priority.

    Technical details

    Source specification data

    Make
    Ariel
    Model
    4G Square Four 1000
    Category
    Allround
    Starter
    Kick
    Comments
    Also
    called ´
    Squariel
    ´.
    Designed
    by
    Edward Turner
    .
    Color Options
    Black/silver
    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
    995.00 ccm (60.71 cubic inches)
    Cooling System
    Air
    Engine Details
    Square four cylinder
    Exhaust System
    Dual two-into-one
    Valves Per Cylinder
    2
    Transmission Type Final Drive
    Chain
    Fuel Capacity
    23.00 litres (6.08 gallons)
    Overall Length
    2,083 mm (82.0 inches)
    Weight Incl Oil Gas Etc
    211.0 kg (465.2 pounds)
    Seat
    Solo seat
    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
    Oil damped telescopic
    Rear Brakes Diameter
    178 mm (7.0 inches)
    Front Brakes Diameter
    203 mm (8.0 inches)

    Available colors

    Black/silver