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MotoLibrary Score
42/100Commuter
Power
20 HP
Top Speed
112 km/h
Engine
745 ccm
Technical Overview
1934 BMW R11 Series 5 Technical Analysis & Specification Breakdown
Positioned in BMW's allround motorcycle lineup, the 1934 BMW R11 Series 5 utilizes a 745 cc (45.5 cu in) air-cooled two cylinder boxer, four-stroke layout. In factory specification, peak output is rated at 20 HP (14.6 kW) at 4,000 rpm, transferring power to the rear wheel through a 3-speed gearbox and shaft drive (cardan) final drive. With a specific output of 26.8 HP per liter, the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.
On the scales, the R11 Series 5 measures 162 kg (357 lbs) wet (curb), translating to a power-to-weight ratio of 0.12 HP/kg (8.1 kg per horsepower). Rider ergonomics and chassis geometry center around a 1,380 mm (54.3 in) wheelbase engineered for quick, flickable steering geometry. The 14-liter (3.7 US gal) fuel tank paired with a rated consumption of 1.5 L/100 km provides an estimated theoretical range of roughly 933 km (580 miles) between fill-ups, while factory top speed is listed at 112 km/h (70 mph).
Specific Output
26.8 HP/L
Power-to-Weight
0.12 HP/kg (8.1 kg/HP)
Theoretical Range
~933 km (580 mi)
Engine
Displacement745.0 ccm (45.46 cubic inches)
Engine TypeTwo cylinder boxer, four-stroke
Engine DetailsTwo cylinder boxer, four-stroke
Power20.0 HP (14.6 kW)) @ 4000 RPM
Compression5.5:1
Bore x Stroke78.0 x 78.0 mm (3.1 x 3.1 inches)
Fuel SystemCarburettor. 24mm Amal
Fuel ControlSidevalves
IgnitionMagneto
LubricationForced feed
CoolingAir
Transmission
Gearbox3-speed
Final DriveShaft drive (cardan) (final drive)
ClutchTwo plates-dry
Performance
Top Speed112.0 km/h (69.6 mph)
Fuel Consumption1.50 litres/100 km (66.7 km/l or 156.81 mpg)
Greenhouse Gases34.8 CO2 g/km. (CO2 - Carbon dioxide emission)
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
