BMW S 1000 RR 2015 vs. BMW M 1000 RR 2021

The BMW S 1000 RR model year 2015 and the BMW M 1000 RR model year 2021 are both supersport motorcycles manufactured by BMW. While they share many similarities in terms of engine specifications and design, there are some notable differences between the two models.

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

In terms of suspension, the BMW S 1000 RR 2015 features a telescopic fork for the front suspension, while the M 1000 RR 2021 has an upside-down telescopic fork. Both models have a swing arm for the rear suspension.

BMW S 1000 RR 2015

In terms of chassis, both models have an aluminum frame with a twin tube design. However, the M 1000 RR has a load-bearing engine, which provides additional stability and rigidity.

Both models have double disk brakes with radial technology for the front brakes. The dimensions and weights of the front and rear tires are similar, with the M 1000 RR having a slightly wider rear tire of 200 mm compared to the 190 mm of the S 1000 RR. The wheelbase of the M 1000 RR is also slightly longer at 1457 mm compared to the 1425 mm of the S 1000 RR. The seat height of the M 1000 RR is higher at 832 mm compared to the 815 mm of the S 1000 RR. The kerb weight of the M 1000 RR is also slightly lighter at 192 kg compared to the 204 kg of the S 1000 RR. Both models have a fuel tank capacity of around 16.5-17.5 liters.

BMW M 1000 RR 2021

In terms of strengths, the S 1000 RR 2015 is praised for its superb shift assistant, incredibly powerful and rev-happy engine, great range of accessories, and the availability of a race-ready data logging tool and calibration tool. On the other hand, the M 1000 RR 2021 is commended for its smooth overall package, strong brakes, precise chassis, and noble details that are a joy to behold in the paddock. It also offers great responsiveness, a rev-happy engine, a great torque curve, and a harmonious transition from load to push mode.

In terms of weaknesses, the S 1000 RR 2015 is noted to have a chassis that can quickly reach its limit in the hands of professionals. The M 1000 RR 2021, on the other hand, has a price package that is not customer-friendly but sales-friendly. Some riders also feel that the footrests could do with more grip on the track, and a higher and harder seat option would be desirable.

In summary, while both the BMW S 1000 RR 2015 and the BMW M 1000 RR 2021 are high-performance supersport motorcycles, the M 1000 RR offers some improvements in terms of engine power, suspension, chassis design, and overall package. However, it also comes at a higher price and has some minor areas for improvement. Ultimately, the choice between the two models will depend on the rider's preferences and priorities.