R 80 RT (reduced effect)

1991 BMW R 80 RT (reduced effect) Technical Analysis & Specification Breakdown

At the heart of the 1991 BMW R 80 RT (reduced effect) motorcycle, BMW pairs a 797 cc (48.6 cu in) air-cooled two cylinder boxer, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 27 HP (19.7 kW) at 5,500 rpm, transferring power to the rear wheel through a 5-speed gearbox and shaft drive (cardan) final drive. With a specific output of 33.9 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 R 80 RT (reduced effect) measures 243 kg (536 lbs) wet (curb), translating to a power-to-weight ratio of 0.11 HP/kg (9 kg per horsepower). The 22-liter (5.8 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 145 km/h (90 mph).

Within MotoLibrary's BMW archive, this model family spans 2 indexed model years from 1991 to 1992, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.