2005 BMW R 850 R Technical Analysis & Specification Breakdown
At the heart of the 2005 BMW R 850 R naked motorcycle, BMW utilizes a 848 cc (51.7 cu in) oil & air-cooled two cylinder boxer, four-stroke layout. In factory specification, peak output is rated at 69.7 HP (50.9 kW) at 7,000 rpm while maximum torque reaches 77 Nm (56.8 lb-ft) at 5,600 rpm, transferring power to the rear wheel through a 6-speed gearbox and shaft drive (cardan) final drive. With a specific output of 82.2 HP per liter and a 1,400 rpm working window between peak torque (5,600 rpm) and peak power (7,000 rpm), the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the R 850 R measures 238 kg (525 lbs) wet (curb), translating to a power-to-weight ratio of 0.29 HP/kg (3.41 kg per horsepower). Rider ergonomics and chassis geometry center around a 800 mm (31.5 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,487 mm (58.5 in) wheelbase engineered for balanced agility and highway composure. The 20.5-liter (5.4 US gal) fuel tank paired with a rated consumption of 4.6 L/100 km provides an estimated theoretical range of roughly 446 km (277 miles) between fill-ups, while factory top speed is listed at 187 km/h (116 mph).
Within MotoLibrary's BMW archive, this model family spans 11 indexed model years from 1996 to 2006, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
82.2 HP/L
Power-to-Weight
0.29 HP/kg (3.41 kg/HP)
Power Band Window
5,600–7,000 rpm
Theoretical Range
~446 km (277 mi)
Engine
Displacement848.0 ccm (51.74 cubic inches)
Engine TypeTwo cylinder boxer, four-stroke
Power69.7 HP (50.9 kW)) @ 7000 RPM
Torque77.0 Nm (7.9 kgf-m or 56.8 ft.lbs) @ 5600 RPM
Compression10.3:1
Bore x Stroke87.5 x 70.5 mm (3.4 x 2.8 inches)
Valves/Cylinder4
Fuel SystemInjection. Electronic intake pipe injection/digital engine management: Bosch Motronic MA 2.4 with overrun fuel cut-off
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.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
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.
