Ktm rc 390 vs duke 390: the search for the top speed king

The KTM RC 390 and Duke 390, two renowned street machines from the Austrian motorcycle giant, have long captivated riders with their exhilarating performance and aggressive styling. While both bikes share the same potent 373cc single-cylinder engine, their distinct designs and aerodynamic profiles raise the question: which one reigns supreme in the realm of top speed? In this comprehensive comparison, we delve into the intricacies of each motorcycle to determine the ultimate victor in this high-stakes race.

Engine and Power: A Common Ground

At the heart of both the KTM RC 390 and Duke 390 lies the same liquid-cooled, single-cylinder engine, displacing 373cc. This potent powerplant churns out an impressive 43 horsepower at 9,000 rpm and 35 Nm of torque at 7,000 rpm. This ample power translates into thrilling acceleration, making both bikes a joy to ride on open roads.

Aerodynamics: A Tale of Two Shapes

While they share the same engine, the KTM RC 390 and Duke 390 differ significantly in their aerodynamic profiles. The RC 390, with its fully faired bodywork, presents a sleek and streamlined silhouette, designed to minimize drag and enhance stability at high speeds. The Duke 390, on the other hand, features a more upright and naked design, sacrificing some aerodynamic efficiency for greater maneuverability.

Transmission and Gearing: Precision and Control

Both the KTM RC 390 and Duke 390 employ a slick six-speed manual transmission, providing riders with ample flexibility to harness the engine’s power effectively. However, the RC 390 boasts a slightly taller final drive ratio, allowing for higher top speeds at the expense of acceleration. The Duke 390, with its shorter final drive ratio, offers quicker acceleration but may fall slightly behind in terms of outright top speed.

Chassis and Suspension: Handling and Stability

The KTM RC 390 and Duke 390 are built upon lightweight steel trellis frames, renowned for their rigidity and agility. Both bikes feature a USD front fork and a monoshock rear suspension, providing excellent handling and stability, even at high speeds. However, the RC 390’s clip-on handlebars and rearset footpegs give it a more aggressive and committed riding position, while the Duke 390’s upright handlebars and mid-set footpegs prioritize comfort and maneuverability.

Brakes: Confidence and Control

When it comes to braking performance, both the KTM RC 390 and Duke 390 are equipped with powerful and progressive brakes. The RC 390 features a single 320mm front disc with a four-piston caliper and a 230mm rear disc with a single-piston caliper. The Duke 390, on the other hand, uses a slightly smaller 300mm front disc with a four-piston caliper and a 230mm rear disc with a single-piston caliper. Despite these differences, both bikes offer excellent stopping power and inspire confidence in riders.

Top Speed: The Ultimate Showdown

Now, let’s address the burning question: which bike has the higher top speed? Based on real-world testing and manufacturer specifications, the KTM RC 390 emerges as the victor in this category. Its aerodynamic design and taller final drive ratio allow it to reach a top speed of approximately 170 km/h (106 mph), slightly exceeding the Duke 390’s top speed of around 165 km/h (103 mph).

Recommendations: The Ultimate Choice

In the exhilarating showdown of the KTM RC 390 vs. Duke 390, the RC 390 emerges victorious in the realm of top speed. Its aerodynamic design and taller final drive ratio give it a slight edge over its naked counterpart. However, the Duke 390 remains a formidable contender, offering impressive acceleration and nimble handling. Ultimately, the choice between these two exceptional street machines depends on the rider’s individual preferences, riding style, and priorities.

Quick Answers to Your FAQs

Q: Which bike is better for beginners, the RC 390 or the Duke 390?

A: The Duke 390 is generally considered more suitable for beginners due to its upright riding position, comfortable ergonomics, and more forgiving handling characteristics.

Q: Is the RC 390 too aggressive for everyday riding?

A: While the RC 390’s aggressive riding position may not be ideal for all riders, it can be adjusted to some extent by using aftermarket handlebars or footpegs.

Q: Can I increase the top speed of my RC 390 or Duke 390?

A: Modifying the engine or gearing can potentially increase the top speed, but it is important to note that such modifications may affect the bike’s reliability and warranty.