BMW R51 1938 - Specifications & Review

Introducing the 1938 BMW R51: A Classic All-Rounder

The 1938 BMW R51 stands as a testament to the brand's pursuit of engineering excellence and innovation during the pre-war era. As an all-round motorcycle, the R51 was designed to cater to a variety of riding styles and preferences, making it a versatile companion for enthusiasts of the time. With its sleek lines and distinctive boxer engine layout, the R51 not only captures the aesthetic allure of classic motorcycles but also represents a pivotal moment in BMW's storied history, when the brand solidified its reputation for quality and performance.

Engine Performance and Riding Characteristics

At the heart of the R51 lies a robust 494cc two-cylinder boxer engine, delivering a commendable 24.07 horsepower at 5600 RPM. This four-stroke powerhouse, with its 6.7:1 compression ratio, provides riders with a smooth and reliable performance, achieving a top speed of 140 km/h (87 mph). The well-balanced design of the engine contributes to the motorcycle's remarkable stability, ensuring a confident and enjoyable ride whether you're navigating city streets or cruising along scenic country roads. With a 4-speed gearbox and a dry single-plate clutch, the R51 offers a responsive and engaging riding experience that resonates with enthusiasts seeking both power and precision.

Key Features and Technology

The R51 is equipped with a steel single cradle frame that not only enhances its durability but also contributes to its agility on the road. The motorcycle features drum brakes—both front and rear—measuring 200 mm in diameter, providing adequate stopping power for its time. The front suspension utilizes a cartridge system, while the rear suspension employs a twin shock swingarm configuration, ensuring a comfortable ride over uneven terrain. Coupled with a fuel capacity of 14 liters (3.70 gallons) and an impressive fuel consumption rate of 4.00 liters per 100 km (around 58.81 mpg), the R51 is designed for longer journeys, making it a practical choice for touring. Although it utilizes a kick starter, the simplicity of this feature complements the R51’s vintage charm, appealing to purists and collectors alike.

Pros and Cons of the BMW R51

Pros:

1. Timeless Design: The classic aesthetic and boxer engine layout capture the essence of vintage motorcycling.
2. Reliable Performance: The 494cc engine delivers smooth power and a solid riding experience, perfect for varied road conditions.
3. Fuel Efficiency: With a consumption rate of 4.00 liters/100 km, the R51 offers impressive mileage for long-distance rides.

Cons:

1. Kick Start Only: The absence of an electric starter may deter some riders who prefer modern conveniences.
2. Limited Power: While adequate for its time, the 24.07 HP may not satisfy those seeking high-performance thrills in today’s riding landscape.
3. Weight Consideration: Weighing in at 182 kg (401.2 lbs), the R51 may feel a bit heavy for novice riders or those accustomed to lighter machines.

In summary, the 1938 BMW R51 is not just a motorcycle; it's a slice of history, blending style, engineering, and performance into a package that continues to attract enthusiasts. Whether you're a collector or a rider looking to embrace the nostalgia of classic motorcycles, the R51 is sure to deliver an engaging experience filled with charm and character.