BMW S 1000 R 2015 vs. BMW F 900 R 2021

The BMW S 1000 R 2015 and the BMW F 900 R 2021 are both naked bikes from BMW, but they have some notable differences in terms of their technical specifications and strengths.

Starting with the engine and drive train, the BMW S 1000 R 2015 is equipped with an in-line 4-cylinder engine that produces 160 HP of power and 112 Nm of torque. On the other hand, the BMW F 900 R 2021 features an in-line 2-cylinder engine that generates 105 HP of power and 92 Nm of torque. While the S 1000 R has a larger displacement of 999 ccm, the F 900 R has a displacement of 895 ccm. This indicates that the S 1000 R has a more powerful engine compared to the F 900 R.

In terms of suspension, both bikes have upside-down telescopic forks at the front and swing arm suspension with a monoshock at the rear. This provides good stability and handling for both models. However, the chassis construction differs between the two bikes. The S 1000 R has an aluminum frame, while the F 900 R has a steel frame. The aluminum frame of the S 1000 R offers a lightweight and rigid structure, which can contribute to better performance and handling.

BMW S 1000 R 2015

When it comes to braking, both bikes are equipped with double disk brakes at the front with four pistons and radial technology. This ensures powerful and efficient braking performance for both models.

In terms of advanced rider assistance systems, the S 1000 R 2015 features dynamic suspension, while the F 900 R 2021 offers ABS, anti-slipping control, and riding modes. These systems enhance safety and control during rides.

Moving on to dimensions and weights, the S 1000 R has a wheelbase of 1439 mm, a seat height of 814 mm, and a kerb weight of 207 kg (with ABS). On the other hand, the F 900 R has a longer wheelbase of 1518 mm, a slightly higher seat height of 815 mm, and a slightly heavier kerb weight of 211 kg (with ABS). The S 1000 R has a larger fuel tank capacity of 17.5 liters compared to the F 900 R's 13 liters.

BMW F 900 R 2021

Now let's discuss the strengths and weaknesses of each model. The S 1000 R 2015 is praised for its powerful and well-controllable engine, powerful braking system, and comparatively comfortable seating position. However, it has some weaknesses, including expensive optional extras, a hard chassis, and vibrations in the handlebars.

On the other hand, the F 900 R 2021 has several strengths. It offers a great cockpit with functional connectivity, extensive electronics that can be operated logically, and a very accessible but still casual handling. The motorcycle is described as riding bland and reserved, but it can also be wild and sporty when needed. It provides a pleasant seating position and offers a wide choice of equipment and configuration options. Additionally, the suspension allows for a wide range of use, providing both comfort and precise handling. However, the F 900 R has a few weaknesses, such as a slightly stiff gearstick (with and without quickshifter), an engine that runs a little rough and lacks elegance at the top, and a poor splash guard at the rear.

In conclusion, while the BMW S 1000 R 2015 and the BMW F 900 R 2021 are both naked bikes from BMW, they have distinct differences in terms of their technical specifications, strengths, and weaknesses. The S 1000 R offers a more powerful engine and a lighter aluminum frame, while the F 900 R provides a great cockpit, extensive electronics, and a wide range of use in terms of suspension. Ultimately, the choice between these two models depends on the rider's preferences and priorities.