R 1100 S

2003 BMW R 1100 S Technical Analysis & Specification Breakdown

At the heart of the 2003 BMW R 1100 S sport touring motorcycle, BMW relies on a 1085 cc (66.2 cu in) two cylinder boxer, four-stroke powerplant. In factory specification, peak output is rated at 98 HP (71.5 kW) at 7,500 rpm while maximum torque reaches 97.6 Nm (72 lb-ft) at 5,750 rpm. With a specific output of 90.3 HP per liter and a 1,750 rpm working window between peak torque (5,750 rpm) and peak power (7,500 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 1100 S measures 229 kg (505 lbs) dry, translating to a power-to-weight ratio of 0.43 HP/kg (2.34 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 19-liter (5 US gal) fuel tank supports practical everyday commuting and weekend road stints.

Within MotoLibrary's BMW archive, this model family spans 7 indexed model years from 1999 to 2005, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.