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Ariel 4G Square Four 1000
1949Allround

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 1949 Ariel 4G Square Four 1000: A Classic Legend Reborn The 1949 Ariel 4G Square Four 1000 stands as a testament to the ingenuity of mid-20th century motorcycle engineering. Positioned as an all-rounder, this bike is not just a mode of transportation; it’s a piece of history, crafted by the renowned Edward Turner. Often affectionately referred to as the "Squariel," this motorcycle was designed to appeal to discerning riders who sought a blend of performance, style, and reliability. With its striking red and silver color options, the 4G Square Four makes a bold statement on the road, attracting enthusiasts and collectors alike. At the heart of the 4G Square Four is its distinctive square four-cylinder engine, boasting a displacement of 995cc. This unique configuration, coupled with a compression ratio of 6.0:1, produces a respectable 35 HP at 5500 RPM, delivering a top speed of 140 km/h (87 mph). The air-cooled engine is fed by an SU MC2 carburettor, ensuring a smooth throttle response that enhances the riding experience. The 4-speed gearbox, combined with a chain final drive, provides riders with seamless gear transitions, allowing for a responsive ride whether cruising on the highway or navigating through city streets. The bike's weight of 211 kg (465.2 lbs) gives it a solid, planted feel, offering stability and confidence for riders. The Ariel 4G Square Four is not just about power; it incorporates advanced technology for its time. The tubular single-loop frame provides a strong foundation, while the oil-damped telescopic front suspension and plunger-link rear suspension ensure a comfortable ride over various terrains. The drum brakes, although conventional, are effective with a front diameter of 203 mm and rear diameter of 178 mm, providing reliable stopping power when needed. With a fuel capacity of 23 liters (6.08 gallons), this motorcycle is equipped for longer journeys, allowing riders to explore the open road without frequent stops. **

Pros

    Cons

    • Unique Engine Design: The square four-cylinder engine offers a distinctive character and smooth power delivery, setting it apart from traditional V-twins and parallel twins.
    • Classic Styling: With its timeless design and available color options, the 4G Square Four is a head-turner that appeals to vintage motorcycle enthusiasts.
    • Comfortable Ride: The effective suspension system and solid weight distribution provide a comfortable and stable ride, even on longer journeys.
    • Weight: At 211 kg, the motorcycle may feel cumbersome to some riders, especially in tight maneuvers or low-speed situations.
    • Drum Brakes: While effective, the drum brakes may not provide the same stopping performance as modern disc brakes, which could be a drawback for safety-conscious riders.
    • Limited Top Speed: Though impressive for its era, the maximum speed of 140 km/h may not satisfy those seeking high-performance thrills in today’s fast-paced riding environment.

    Technical details

    Source specification data

    Make
    Ariel
    Model
    4G Square Four 1000
    Category
    Allround
    Starter
    Kick
    Comments
    Also
    called ´
    Squariel
    ´.
    Designed
    by
    Edward Turner
    .
    I
    replaced this model in 1949.
    Color Options
    Red/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

    Red/silver