What is the engine displacement of the 1931 Ariel 4 F Square Four 500?

The 1931 Ariel 4 F Square Four 500 has an engine displacement of 498.0 ccm (30.39 cubic inches).

What is the top speed of the 1931 Ariel 4 F Square Four 500?

The 1931 Ariel 4 F Square Four 500 has a top speed of 120.7 km/h (75.0 mph).

How much does the 1931 Ariel 4 F Square Four 500 weigh?

The 1931 Ariel 4 F Square Four 500 has a dry weight of 193.0 kg (425.5 pounds).

1931 Ariel 4 F Square Four 500 Price, Specs, Review

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Review

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The 1931 Ariel 4 F Square Four 500 represents a fascinating chapter in motorcycle history, showcasing innovative engine design of its era. Its 498cc square four engine was a bold move, offering a unique power delivery. With a top speed of 75 mph and a substantial weight of 425.5 pounds, this machine was designed for comfortable touring rather than outright performance. The 4-speed gearbox allows the rider to make the most of the engine's characteristics, while the 3.5-gallon fuel tank provides a reasonable range for longer journeys. The ergonomics of the Ariel 4 F Square Four 500 prioritize rider comfort, with a focus on an upright riding position suitable for extended periods in the saddle. The spring girder front suspension, typical of the time, provides a compliant ride on less-than-perfect road surfaces. Drum brakes offer adequate stopping power for the speeds it could achieve, reflecting the braking technology available at the time. This motorcycle would appeal to enthusiasts of vintage machinery and those seeking a unique riding experience. It's a machine that demands respect and an understanding of pre-war engineering. The Ariel 4 F Square Four 500 is more than just a motorcycle; it's a piece of history that offers a glimpse into the ingenuity of early motorcycle design.

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Pros (Advantages)

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✅ Why buy this bike?

• Groundbreaking Square Four engine design offered exceptional smoothness for its era. • Innovative four-cylinder layout provided superior balance and reduced vibration compared to singles. • Ariel's reputation for quality engineering ensured robust construction and reliability. • The 500cc engine provided ample power for touring and comfortable cruising speeds. • Distinctive engine configuration made it a prestigious and desirable machine. • Early adoption of unit construction for engine and gearbox improved structural integrity.

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Cons (Disadvantages)

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⚠️ Things to consider

• Complex engine design made maintenance and repairs more challenging and expensive. • Relatively heavy for its displacement, impacting agility and initial acceleration. • Early Square Four models could suffer from overheating issues in specific conditions. • Limited availability of specialized parts due to its vintage and unique engine. • Higher initial purchase price compared to simpler, single-cylinder alternatives.

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License Class (EU)

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Rule of thumb: under 125cc / 15HP → A1, under 47HP → A2, above → A.

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Fuel Economy & Running Costs

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Estimated average for 498cc class: 45-60 mpg (4.0-5.5 L/100km)

⛽ Tank: 13.25 litres (3.50 US gallons)

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Insurance Class

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