
Ariel 4G Square Four 1000
Key specifications
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)