R37

1925 BMW R37 Technical Analysis & Specification Breakdown

At the heart of the 1925 BMW R37 allround motorcycle, BMW features a 494 cc (30.1 cu in) air-cooled two cylinder boxer, four-stroke configuration. In factory specification, peak output is rated at 16 HP (11.7 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 32.4 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 R37 measures 134 kg (295 lbs) wet (curb), translating to a power-to-weight ratio of 0.12 HP/kg (8.38 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 4 L/100 km provides an estimated theoretical range of roughly 350 km (217 miles) between fill-ups, while factory top speed is listed at 115 km/h (71 mph).

Within MotoLibrary's BMW archive, this model family spans 2 indexed model years from 1925 to 1926, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.