What is the engine displacement of the 1932 BMW R 4 Series 1?

The 1932 BMW R 4 Series 1 has an engine displacement of 398.0 ccm (24.29 cubic inches).

How much horsepower does the 1932 BMW R 4 Series 1 have?

The 1932 BMW R 4 Series 1 produces 12.0 HP (8.8 kW )) @ 4000 RPM of power.

What is the top speed of the 1932 BMW R 4 Series 1?

The 1932 BMW R 4 Series 1 has a top speed of 100.0 km/h (62.1 mph).

What is the fuel consumption of the 1932 BMW R 4 Series 1?

The 1932 BMW R 4 Series 1 has an approximate fuel consumption of 3.50 litres/100 km (28.6 km/l or 67.21 mpg).

1932 BMW R 4 Series 1 Price, Specs, Review

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Review

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The 1932 BMW R 4 Series 1 represents a significant step in motorcycle development during its time. Powered by a 398cc single-cylinder engine, it produced a modest 12 horsepower at 4000 RPM, enabling a top speed of 100 km/h. The engine character would have been very basic, providing adequate power for the riding conditions of the era. The 10-liter fuel tank ensured reasonable range for touring. Ergonomics on the R 4 would be typical for a motorcycle of the 1930s, with an upright riding position and a focus on simplicity. The friction shock absorber up front provided a basic level of suspension, while the expanding drum brake offered rudimentary stopping power. This setup would require a skilled rider to manage on varied road surfaces. The target rider for the BMW R 4 Series 1 was likely someone seeking reliable transportation rather than outright performance. Its simple design and manageable power delivery would appeal to those who valued practicality and ease of maintenance. This motorcycle embodies the early days of motorcycling, where the journey was as important as the destination.

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Pros (Advantages)

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✅ Why buy this bike?

• Pioneering shaft drive offered unmatched reliability and cleanliness compared to chain-driven rivals of the era. • BMW's advanced horizontally-opposed twin-cylinder engine provided excellent balance and smooth power delivery. • Robust build quality and engineering ensured impressive durability for a motorcycle of its time. • Innovative enclosed valvetrain reduced maintenance and protected components from dirt and wear. • Relatively comfortable ergonomics for long-distance touring compared to many contemporary motorcycles. • Strong collector's item status due to its historical significance and BMW's brand heritage.

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Cons (Disadvantages)

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⚠️ Things to consider

• Limited power output from the 398cc engine made it slow by modern standards, even for its time. • Drum brakes offered minimal stopping power, requiring anticipation and careful braking. • Lack of modern suspension technology resulted in a harsh ride over uneven surfaces. • Spare parts are extremely rare and expensive, making restoration and maintenance challenging. • High initial cost for its era made it inaccessible to most buyers, limiting original ownership.

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License Class (EU)

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The BMW R 4 Series 1 produces 12 HP, fitting A2 license limits (max 35 kW / 47 HP). For riders 18+.

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Fuel Economy & Running Costs

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Manufacturer-quoted consumption: 3.50 litres/100 km (28.6 km/l or 67.21 mpg).

⛽ Tank: 10.00 litres (2.64 US gallons)

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Insurance Class

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