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The 1977 BMW R100RS and 1983 BMW K100 represent two chapters in BMW's storied history.
The 1977 BMW R100RS from Germany was powered by a 980cc OHV flat-twin producing 70hp at 7250rpm. Weighing 210.0kg (463 lbs) and with a seat height of 810mm, it was aimed at touring riders.
The 1983 BMW K100 by contrast offered 987cc of DOHC inline-4 power, delivering 90hp at 8000rpm. Tipping the scales at 240.0kg (529 lbs) with a top speed of 215km/h (134 mph), it offered a distinct riding experience. 1970s bikes from the Japanese superbike revolution are increasingly sought after. Clean, original examples have seen significant value appreciation.
The 1977 BMW R100RS from Germany was powered by a 980cc OHV flat-twin producing 70hp at 7250rpm. Weighing 210.0kg (463 lbs) and with a seat height of 810mm, it was aimed at touring riders.
The 1983 BMW K100 by contrast offered 987cc of DOHC inline-4 power, delivering 90hp at 8000rpm. Tipping the scales at 240.0kg (529 lbs) with a top speed of 215km/h (134 mph), it offered a distinct riding experience. 1970s bikes from the Japanese superbike revolution are increasingly sought after. Clean, original examples have seen significant value appreciation.
Specifications Comparison
| 1977 BMW R100RS | 1983 BMW K100 | |
|---|---|---|
| Displacement | 980 cc | 987 cc |
| Power | 70 hp | 90 hp |
| Torque | 72.0 Nm | 86.0 Nm |
| Cylinders | 2 | 4 |
| Top Speed | 200 km/h | 215 km/h |
| Quarter Mile | — | — |
| Dry Weight | 210.0 kg | 240.0 kg |
| Wet Weight | 228.0 kg | 258.0 kg |
| Seat Height | 810 mm | 810 mm |
| Wheelbase | 1465 mm | 1516 mm |
| Fuel Capacity | 24.0 L | 22.0 L |
| Gears | 5 -speed | 5 -speed |
The Verdict
Comparing these two BMW machines reveals the brand's evolution. The 1977 BMW R100RS laid the groundwork with 70hp, while the later 1983 BMW K100 pushed output to 90hp. From a collector's perspective, the 1977 BMW R100RS holds the edge with a 8/10 rating. Either way, both are worthy additions to any BMW collection.
About the 1977 BMW R100RS
A touring motorcycle from 1977, the 1977 BMW R100RS delivers 70hp from its 980cc OHV flat-twin engine.
Full 1977 BMW R100RS Profile →About the 1983 BMW K100
A touring motorcycle from 1983, the 1983 BMW K100 delivers 90hp from its 987cc DOHC inline-4 engine.
Full 1983 BMW K100 Profile →