BMW S 1000 RR 2017 vs. BMW M 1000 RR 2021

The BMW S 1000 RR model year 2017 and the BMW M 1000 RR model year 2021 are both supersport motorcycles from BMW, known for their powerful performance and advanced technology. While they share many similarities in terms of engine specifications, suspension, and chassis, there are also notable differences between the two models.

In terms of engine and drive train, both the S 1000 RR 2017 and M 1000 RR 2021 feature an in-line 4-cylinder engine with a displacement of 999cc. They have the same bore and stroke measurements of 80mm and 49.7mm, respectively. However, the M 1000 RR 2021 offers a higher engine power of 212 HP compared to the 199 HP of the S 1000 RR 2017. Both models have a torque of 113 Nm, but the M 1000 RR 2021 has a slightly higher compression ratio of 13.5 compared to the 13 of the S 1000 RR 2017.

In terms of suspension, both models feature an upside-down telescopic fork at the front and a swing arm at the rear. The chassis of both models is made of aluminum, with the S 1000 RR 2017 having a twin-tube frame and the M 1000 RR 2021 having a twin-tube load-bearing engine frame. This difference in frame type may contribute to the M 1000 RR 2021's smoother overall package and precise chassis.

BMW S 1000 RR 2017

Both models have double disk brakes at the front with radial technology, providing strong braking performance. The front and rear tire dimensions are similar, with a width of 120mm at the front and 190mm/200mm at the rear, and a diameter of 17 inches for both. The wheelbase of the M 1000 RR 2021 is slightly longer at 1457mm compared to the 1438mm of the S 1000 RR 2017. The seat height of the M 1000 RR 2021 is also higher at 832mm compared to the 815mm of the S 1000 RR 2017.

In terms of weight, the M 1000 RR 2021 is lighter with a kerb weight of 192kg compared to the 208kg of the S 1000 RR 2017. The fuel tank capacity of the M 1000 RR 2021 is slightly smaller at 16.5 liters compared to the 17.5 liters of the S 1000 RR 2017.

BMW M 1000 RR 2021

Now let's discuss the strengths and weaknesses of each model. The S 1000 RR 2017 is praised for its complete electronic equipment, strong and easy-to-control engine, comfortable seating position, and good chassis performance on the road and at trackdays. However, it is noted to have brake fade under high load on the racetrack, ride quality that is suitable for trackdays but not ideal for racing, and a somewhat outdated appearance.

On the other hand, the M 1000 RR 2021 is described as a smooth overall package with strong brakes, a precise chassis, and noble details that are visually appealing. It has a responsive and rev-happy engine with a great torque curve, making it enjoyable to ride. However, it is criticized for its high price package, footrests that could benefit from more grip on the track, and a desire for a higher and harder seat option.

In conclusion, while both the BMW S 1000 RR 2017 and BMW M 1000 RR 2021 are high-performance supersport motorcycles, the M 1000 RR 2021 offers some improvements in terms of engine power, frame type, weight, and overall package. However, it also comes with a higher price tag and some minor areas for improvement. Ultimately, the choice between the two models will depend on the rider's preferences, budget, and intended use.