BMW R20
1938Allround

BMW R20

Key specifications

Engine
192 cc
Power
8 HP
Fuel type
petrol
Fuel capacity
3.2 L
Transmission
3-speed
Front brakes
Expanding brake (drum brake)
Rear brakes
Expanding brake (drum brake)

Overview

Introducing the 1938 BMW R20, a classic gem that epitomizes the charm and engineering prowess of pre-war motorcycles. Positioned within the allround category, the R20 was designed for versatility, appealing to both commuting riders and weekend adventurers. BMW's commitment to quality and performance is evident in its design, making it one of the standout motorcycles of its era. With its sleek lines and robust build, the R20 is not just a mode of transport; it’s a piece of history that continues to capture the hearts of motorcycle enthusiasts and collectors alike. At the heart of the R20 is its single-cylinder, four-stroke engine, boasting a displacement of 192cc. This powerplant generates a respectable 8.02 HP at 5400 RPM, delivering a top speed of 95 km/h (59 mph). While not designed for blistering speed, the R20 offers a delightful riding experience characterized by smooth acceleration and a pleasing thrum from its air-cooled engine. The 3-speed gearbox, combined with the reliable shaft drive, ensures a seamless transition between gears, allowing riders to navigate urban environments or open roads with ease. The bike’s compression ratio of 6.1:1 enhances its torque delivery, making it an enjoyable ride for enthusiasts who appreciate a leisurely pace. The R20 is rich in features that reflect the technological advancements of its time. Its steel single cradle frame provides sturdy support, while the telescopic front fork and rigid rear suspension offer a balanced ride. The dual 160 mm drum brakes, found on both the front and rear, provide adequate stopping power for the era, ensuring safety without compromising the classic aesthetic. Additionally, the kick starter adds a nostalgic touch, harking back to simpler times in motorcycling. With a fuel capacity of 12 liters, the R20 is built for longer rides, allowing riders to explore without frequent stops. **

Pros

  • Classic Aesthetic: Timeless design that appeals to vintage motorcycle enthusiasts and collectors.
  • Reliable Engine: The air-cooled, single-cylinder engine is known for its durability and ease of maintenance.
  • Smooth Ride: The combination of a shaft drive and telescopic front suspension ensures a comfortable riding experience.

Cons

  • Limited Power: With just over 8 HP, acceleration is modest, which may not satisfy speed enthusiasts.
  • Basic Technology: Lacks modern features such as electric starting or advanced braking systems, which some riders may find inconvenient.
  • Weighty Build: At 130 kg (286.6 lbs), it can feel a bit heavy compared to contemporary lightweight motorcycles, especially for novice riders.

Technical details

Source specification data

Make
BMW
Model
R20
Category
Allround
Starter
Kick
Power
8.02 HP (5.9 kW)) @ 5400 RPM
Clutch
Dry-multiplate-cable operated
Gearbox
3-speed
Ignition
Battery
Top Speed
95.0 km/h (59.0 mph)
Fuel System
Carburettor
Bore X Stroke
63.0 x 64.0 mm (2.5 x 2.5 inches)
Compression
6.1:1
Displacement
192.00 ccm (11.72 cubic inches)
Cooling System
Air
Engine Details
Single cylinder, four-stroke
Lubrication System
Wet sump
Transmission Type Final Drive
Shaft drive (cardan)
Fuel Capacity
12.00 litres (3.17 gallons)
Overall Width
800 mm (31.5 inches)
Overall Height
900 mm (35.4 inches)
Overall Length
2,000 mm (78.7 inches)
Weight Incl Oil Gas Etc
130.0 kg (286.6 pounds)
Seat
Solo seat with springs
Rear Tyre
2.99-19
Frame Type
Steel-single cradlel
Front Tyre
2.99-19
Rear Brakes
Expanding brake (drum brake)
Front Brakes
Expanding brake (drum brake)
Rear Suspension
Rigid
Front Suspension
Telescopic fork
Rear Brakes Diameter
160 mm (6.3 inches)
Front Brakes Diameter
160 mm (6.3 inches)