BMW R4 Series 1 1932 - Specifications & Review

Discover the 1932 BMW R4 Series 1: A Blend of Elegance and Performance

The 1932 BMW R4 Series 1 stands as a remarkable testament to the artistry and engineering prowess of early 20th-century motorcycle manufacturing. Positioned in the all-round category, this motorcycle captures the hearts of enthusiasts seeking both style and functionality. With its distinctive design and innovative features, the R4 was not just a means of transport; it was an emblem of freedom and adventure that resonated with the spirit of its time. Its classic lines and robust construction evoke nostalgia, making it a sought-after piece for collectors and vintage motorcycle aficionados alike.

At the heart of the R4 Series 1 lies a robust 398cc single-cylinder four-stroke engine that delivers a respectable 12 horsepower at 4,000 RPM. This powerplant, with a compression ratio of 5.7:1, propels the motorcycle to a top speed of 100 km/h (62.1 mph), perfect for leisurely rides and spirited weekend excursions. The engine's design, featuring a bore and stroke of 84.0 x 78.0 mm, emphasizes a balance between efficiency and performance, allowing for a commendable fuel consumption rate of just 3.50 liters per 100 km (67.21 mpg). Riders will appreciate the smooth and predictable power delivery, thanks to the reliable carburettor fuel system and air cooling, which harmonize to create an enjoyable and engaging riding experience.

The R4 Series 1 is equipped with a pressed steel duplex frame that combines both strength and lightness, weighing in at 137 kg (302 lbs) when fully fueled. The motorcycle features a rigid rear suspension and a friction shock absorber up front, ensuring that rides remain stable while absorbing the bumps of the road. The dual expanding drum brakes, with a diameter of 180 mm, provide sufficient stopping power, allowing the rider to navigate with confidence. Additional touches, such as the kick starter and a generous 10-liter fuel tank, further enhance its practicality, making it an ideal companion for long-distance journeys or charming weekend escapades.

Pros and Cons of the 1932 BMW R4 Series 1

Pros:

1. Timeless Design: The classic aesthetics of the R4 Series 1 appeal to vintage motorcycle enthusiasts and collectors alike.
2. Fuel Efficiency: With a fuel consumption of 3.50 liters per 100 km, it offers impressive mileage for a motorcycle of its era.
3. Smooth Performance: The single-cylinder engine provides a reliable power delivery, making it enjoyable for both novice and experienced riders.

Cons:

1. Limited Power Output: At 12 HP, the engine may feel underpowered for those seeking high-performance thrills.
2. Basic Suspension: The rigid rear suspension may not offer the level of comfort found in modern motorcycles, especially on rough terrain.
3. Kick Start Only: The absence of an electric starter may deter some riders accustomed to modern conveniences, requiring a bit of effort to get it going.

In summary, the 1932 BMW R4 Series 1 encapsulates the essence of early motorcycle design while delivering a reliable and efficient ride. Whether you’re drawn to its historical significance or its charming characteristics, the R4 invites you to experience the road in a way that few modern machines can replicate.