
Ariel 4G Square Four 1000
Key specifications
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)