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BMW · 1979–1995

1991 BMW R 100 RT

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1991 BMW R 100 RT
Auction record
Average sale
$4,437
Sales
6
Low
$2,100
High
$8,100
+56%vs prior 12 months

Specifications

Category
Sport touring
Displacement
979.0 ccm (59.74 cubic inches)
Displacement (cc)
979.00
Engine details
Two cylinder boxer, four-stroke
Power
60.0 HP (43.8 kW) @ 6500 RPM
Top speed
168.0 km/h (104.4 mph)
Compression
8.4:1
Bore × stroke
94.0 x 70.6 mm (3.7 x 2.8 inches)
Valves/cyl
2.0
Fuel control
Overhead Valves (OHV)
Cooling
Air
Gearbox
5-speed
Transmission
Shaft drive (cardan) (final drive)
Front tyre
90/90-18
Rear tyre
120/90-18
Front brakes
Dual disc
Rear brakes
Expanding brake
Wet weight
238.0 kg (524.7 pounds)
Fuel capacity
22.00 litres (5.81 US gallons)

The 1991 BMW R 100 RT

1991 BMW R 100 RT sits in the middle of BMW's touring range, built for riders who want distance-eating comfort without stepping up to a full dresser. This is the airhead boxer twin in its final, most refined form, wrapped in a substantial fairing designed to push wind and weather away from the rider rather than around them. Power delivery is unhurried and torque-driven, the kind of engine that rewards steady highway cruising over aggressive throttle work, and the shaft drive means no chain maintenance on long trips. It's a bike that feels heavy at a standstill but settles into a stable, planted character once moving, which is exactly the point on a machine meant for touring rather than back-road thrashing. The 1991 model carried over without significant mechanical changes from the prior year — buyers comparing it to a 1990 example should focus on mileage, service history, and condition rather than spec differences. Owners tend to be experienced riders, often coming from smaller BMWs or Japanese tourers, who want the airhead engine specifically before BMW moved to the oilhead generation. Collector interest sits at a moderate level, driven mostly by riders who want a usable classic rather than a garage ornament.

Auction history

DateListingPriceMileageSource
Oct 8, 20251991 BMW R100RT w/Watsonian Monaco Sidecar$3,000Bring a Trailer
Oct 6, 2025Modified 1991 BMW R100RT$8,100Bring a Trailer
Aug 15, 20251991 BMW R100RT$3,520Bring a Trailer
Oct 2, 20241991 BMW R100RT$3,600Bring a Trailer
Jun 9, 20241991 BMW R100RT$2,100Bring a Trailer
Apr 19, 20221991 BMW R100RT$6,300Bring a Trailer