Aprilia RS 660 2021 vs. Kawasaki Ninja 400 2018

The Aprilia RS 660 2021 and the Kawasaki Ninja 400 2018 are both supersport motorcycles that offer impressive performance and handling. However, there are several key differences between the two models.

In terms of the engine and powertrain, the Aprilia RS 660 2021 features an inline twin-cylinder engine with a displacement of 659cc, producing 100 horsepower and 67 Nm of torque. It has a higher compression ratio of 13.5 and is equipped with four valves per cylinder. On the other hand, the Kawasaki Ninja 400 2018 also has an inline twin-cylinder engine but with a smaller displacement of 399cc, generating 45 horsepower and 38 Nm of torque. It has a lower compression ratio of 11.5 and also features four valves per cylinder. Overall, the Aprilia RS 660 2021 offers significantly more power and torque compared to the Kawasaki Ninja 400 2018.

In terms of suspension, both motorcycles feature a telescopic front fork and a rear swingarm with a monoshock. However, the Aprilia RS 660 2021 offers additional adjustability with pre-load and rebound settings, allowing for a more personalized riding experience. The Kawasaki Ninja 400 2018, on the other hand, only offers pre-load adjustment. This gives the Aprilia RS 660 2021 an advantage in terms of suspension customization and fine-tuning.

Aprilia RS 660 2021

When it comes to the chassis, the Aprilia RS 660 2021 features an aluminum frame with a rake of 65.9 degrees and a trail of 104.6 mm. This provides a sporty and agile handling experience. On the other hand, the Kawasaki Ninja 400 2018 has a steel frame with a slightly smaller rake of 63 degrees and a trail of 93 mm. While both motorcycles offer good handling, the Aprilia RS 660 2021's chassis design may provide a more responsive and precise feel on the road.

In terms of braking, the Aprilia RS 660 2021 is equipped with dual disc brakes at the front with a diameter of 320 mm and radial technology. The Kawasaki Ninja 400 2018, on the other hand, has a single disc brake at the front with a diameter of 310 mm and utilizes petal technology. Both motorcycles offer reliable braking performance, but the Aprilia RS 660 2021's larger dual disc setup may provide better stopping power and heat dissipation.

In terms of advanced rider assistance systems, the Aprilia RS 660 2021 offers a comprehensive package including ABS, multiple riding modes, launch control, ride-by-wire throttle, quick shifter, traction control, and anti-wheelie control. The Kawasaki Ninja 400 2018, on the other hand, only offers ABS. This gives the Aprilia RS 660 2021 a significant advantage in terms of electronic features and rider aids.

In terms of dimensions and weights, both motorcycles have similar wheel sizes with a 17-inch diameter at the front and rear. However, the Aprilia RS 660 2021 has wider tires, measuring 120 mm at the front and 180 mm at the rear, compared to the Kawasaki Ninja 400 2018's 110 mm front and 150 mm rear tires. The Aprilia RS 660 2021 also has a slightly longer wheelbase of 1370 mm compared to the Kawasaki Ninja 400 2018's 1370 mm. Additionally, the Aprilia RS 660 2021 has a higher seat height of 820 mm compared to the Kawasaki Ninja 400 2018's 785 mm. In terms of weight, the Aprilia RS 660 2021 weighs 183 kg with ABS, while the Kawasaki Ninja 400 2018 weighs 168 kg with ABS. Overall, the Aprilia RS 660 2021 is slightly larger and heavier than the Kawasaki Ninja 400 2018.

Kawasaki Ninja 400 2018

In terms of strengths, the Aprilia RS 660 2021 offers a powerful engine, a comprehensive electronic package, a sporty chassis, a pleasant sound, reduced weight, and a sporty appearance. The Kawasaki Ninja 400 2018, on the other hand, has a chassis suitable for sporty use, lightweight and effortless handling, a smooth engine response, a relaxed seating position that increases confidence, and LED headlights.

In terms of weaknesses, the Aprilia RS 660 2021 has a less legible tachometer, while the Kawasaki Ninja 400 2018 has non-adjustable brake and clutch levers and excessive wind noise with the stock windshield for riders over 180 cm tall.

In summary, the Aprilia RS 660 2021 and the Kawasaki Ninja 400 2018 are both impressive supersport motorcycles, but the Aprilia RS 660 2021 offers more power, advanced electronic features, and a sportier overall package. However, the Kawasaki Ninja 400 2018 has its own strengths, such as a lightweight and easy-to-handle nature, making it a suitable option for riders looking for a more relaxed and approachable sportbike.