The BMW S 1000 RR model year 2020 and the BMW M 1000 RR model year 2021 are both supersport motorcycles from BMW, known for their performance and advanced technology. While they share many similarities in terms of technical specifications, there are some notable differences between the two models.
In terms of engine and drive train, both models feature an in-line four-cylinder engine with the same bore and stroke dimensions. However, the BMW M 1000 RR has a slightly higher engine power of 212 HP compared to the 207 HP of the BMW S 1000 RR. Both models have the same torque output of 113 Nm. The compression ratio of the BMW M 1000 RR is also slightly higher at 13.5 compared to 13.3 in the BMW S 1000 RR. Both models have a 999cc displacement and utilize DOHC valve technology.
The suspension setup of both models is similar, with upside-down telescopic forks in the front and a swing arm with a monoshock in the rear. The front suspension has a diameter of 45 mm in both models and offers adjustment options for compression, preload, and rebound. The rear suspension also features compression, preload, and rebound adjustment. The material used for the swing arm is aluminum in both models.
In terms of chassis, both models feature an aluminum frame with a twin-tube design that acts as a load-bearing engine. The rake and trail measurements differ slightly between the two models, with the BMW M 1000 RR having a rake of 66.4 degrees and a trail of 99.8 mm, while the BMW S 1000 RR has a rake of 66.9 degrees and a trail of 93.9 mm.
Both models are equipped with double disk brakes in the front with a diameter of 320 mm. The brakes are hydraulic and utilize radial technology. The dimensions of the front and rear tires are also similar, with a width of 120 mm in the front and 17-inch diameter for both models. However, the BMW M 1000 RR has a wider rear tire with a width of 200 mm compared to the 190 mm width of the BMW S 1000 RR.
Both models come with advanced rider assistance systems such as ABS, riding modes, launch control, ride by wire, quickshifter, and traction control. They also share the same fuel tank capacity of 16.5 liters and are equipped with LED headlights.
When comparing the strengths of the two models, the BMW S 1000 RR 2020 is praised for its very linear power delivery, wide rev range, and excellent DDC (Dynamic Damping Control) system. It is considered a harmonious overall package both on the road and on the racetrack. On the other hand, the BMW M 1000 RR 2021 is commended for its smooth overall package, strong brakes, precise chassis, and rev-happy engine. It offers a great torque curve and a harmonious transition from load to push mode.
In terms of weaknesses, the BMW S 1000 RR 2020 is criticized for being somewhat "characterless" compared to its competitors and lagging behind on the spec sheet. The BMW M 1000 RR 2021 is noted for its price package, which is seen as more sales-friendly than customer-friendly. Some riders also suggest that the footrests could offer more grip on the track, and a higher and harder seat option would be desirable.
In conclusion, while the BMW S 1000 RR 2020 and the BMW M 1000 RR 2021 share many similarities in terms of technical specifications, the M 1000 RR offers slight improvements in engine power, compression ratio, and rear tire width. Both models have their strengths and weaknesses, with the S 1000 RR praised for its controllability and wide rev range, and the M 1000 RR praised for its smoothness and responsiveness. Ultimately, the choice between the two models will depend on individual preferences and priorities.