BMW R4 Series 5
1936Allround

BMW R4 Series 5

Key specifications

Engine
398 cc
Power
14 HP
Fuel type
petrol
Fuel capacity
3.2 L
Front brakes
Expanding brake (drum brake)
Rear brakes
Expanding brake (drum brake)

Overview

Introducing the 1936 BMW R4 Series 5, a classic motorcycle that embodies the spirit of pre-war German engineering and design. Positioned as a versatile all-rounder, the R4 Series 5 was crafted for both urban commuting and leisurely country rides, appealing to a wide range of motorcycling enthusiasts. Its combination of style, reliability, and innovative technology made it a standout in the mid-1930s marketplace, establishing BMW's reputation for quality and performance that endures to this day. At the heart of the R4 is a robust 398cc single-cylinder, four-stroke engine that produces a respectable 14 horsepower at 4,000 RPM. This powerplant delivers a top speed of 95 km/h (59 mph), making it a capable choice for the roads of its time. Riders will appreciate the smooth torque delivery and the delightful rumble of the air-cooled engine, all while enjoying impressive fuel efficiency of just 3.50 litres per 100 km (67.21 mpg). The shaft drive system not only enhances reliability but also simplifies maintenance, allowing riders to focus more on the open road rather than the intricacies of their machine. The R4 Series 5 features a pressed steel duplex frame that provides both strength and agility, complemented by its cartridge-type front suspension and rigid rear suspension. This design results in a ride that strikes a balance between comfort and handling precision. The motorcycle is equipped with 180mm drum brakes on both the front and rear, offering dependable stopping power for a machine of its era. With a fuel capacity of 12 litres (3.17 gallons), riders can venture further afield without the constant worry of refueling, making the R4 an excellent choice for weekend getaways. **

Pros

  • Excellent Fuel Efficiency: With a consumption of just 3.50 litres/100 km, the R4 Series 5 allows for extended rides without frequent stops for gas.
  • Reliable Shaft Drive: The cardan shaft system reduces maintenance needs and enhances the overall longevity of the drivetrain.
  • Classic Aesthetic: The vintage design and engineering reflect BMW's commitment to quality, making it a desirable model for collectors and enthusiasts alike.

Cons

  • Limited Power Output: With only 14 HP, the R4 may struggle to keep pace with modern traffic on highways.
  • Rigid Rear Suspension: While it offers a classic ride feel, the lack of rear suspension travel can result in a harsher ride over rough surfaces.
  • Kick Start Only: The absence of an electric start may deter some riders who prefer more convenience in starting their motorcycles, especially in colder conditions.

Technical details

Source specification data

Make
BMW
Model
R4 Series 5
Category
Allround
Starter
Kick
Power
14.00 HP (10.2 kW)) @ 4000 RPM
Clutch
Dry-single plate-cable operated
Top Speed
95.0 km/h (59.0 mph)
Fuel System
Carburettor. SUM CK 3/500 Fr
Compression
5.7:1
Displacement
398.00 ccm (24.29 cubic inches)
Cooling System
Air
Engine Details
Single cylinder, four-stroke
Fuel Consumption
3.50 litres/100 km (28.6 km/l or 67.21 mpg)
Greenhouse Gases
O2
g/km. (
O2
-
Carbon
dioxide emission)
Lubrication System
Wet sump
Transmission Type Final Drive
Shaft drive (cardan)
Fuel Capacity
12.00 litres (3.17 gallons)
Overall Width
850 mm (33.5 inches)
Overall Height
959 mm (37.8 inches)
Overall Length
1,980 mm (78.0 inches)
Seat
Solo seat with springs
Rear Tyre
3.50-26.00
Frame Type
Pressed steel duplex
Front Tyre
3.50-26.00
Rear Brakes
Expanding brake (drum brake)
Front Brakes
Expanding brake (drum brake)
Rear Suspension
Rigid
Front Suspension
Cartridge
Rear Brakes Diameter
180 mm (7.1 inches)
Front Brakes Diameter
180 mm (7.1 inches)