Aprilia Rs 660 Vs Honda Cbr650r Top Speed Acceleration

Is it possible for a twin-cylinder engine to outrun a screaming inline-four? For decades, the smooth, high-revving power of a Japanese four-cylinder was the undisputed king of the middleweight sportbike class. But the game has changed. When you line up the Aprilia RS 660 against the Honda CBR650R, you’re not just comparing two motorcycles. You’re witnessing a philosophical battle: Italian V-twin character (in a parallel package) versus Japanese precision engineering. The numbers might be closer than you think.

Which Bike Is Truly Faster Off the Line?

The Aprilia RS 660 is faster off the line, thanks to its superior power-to-weight ratio and punchier low-to-mid-range torque delivery. While both bikes post impressive 0-60 mph times, the Aprilia consistently clocks in around 3.2 to 3.4 seconds, while the Honda CBR650R is a hair behind at approximately 3.4 to 3.6 seconds. That’s a tiny margin on paper, but it feels like a canyon on the street.

This difference comes down to two key factors: weight and engine character. The RS 660 weighs a mere 183 kg (403 lbs) wet, while the CBR650R tips the scales at 208 kg (458 lbs). That 25 kg difference is enormous; it’s like the Honda is carrying a passenger that the Aprilia left at home. In my experience, this lightness makes the Aprilia feel explosive from a standstill. You don’t have to wring its neck to get moving. The 270-degree parallel-twin engine is designed to mimic the grunt of a V-twin, delivering its peak torque of 67 Nm much earlier in the rev range than the Honda.

The CBR650R, with its classic inline-four, needs to be revved out to find its sweet spot. Its 63 Nm of torque arrives later, meaning you have to work the clutch and throttle with more precision to launch it effectively. From a standing start, the Aprilia just hooks up and goes. An absolute rocket.

What Is the True Top Speed of the RS 660 and CBR650R?

The Aprilia RS 660 has a higher top speed, generally reaching around 148 mph (238 km/h), whereas the Honda CBR650R tops out closer to 140 mph (225 km/h). While the Honda’s inline-four engine is known for its top-end rush, the Aprilia’s combination of superior aerodynamics, slightly more horsepower (100 hp vs. 94 hp), and that significant weight advantage gives it the edge in a long pull.

But the raw number doesn’t tell the whole story. The way they get there is fundamentally different. The Honda builds speed with a creamy, linear surge that feels utterly unflappable. It’s a smooth, predictable climb to its limit. The Aprilia, on the other hand, feels more frantic and alive. Its final push to top speed is more aggressive, accompanied by a V-twin-like soundtrack that makes the experience feel faster than it might even be. Unexpectedly, it’s the Aprilia’s more compact and track-focused riding position that helps the rider tuck in more effectively, contributing to that higher terminal velocity.

How Do Their Engines Dictate Performance?

The core of this rivalry lies in their engines: a punchy parallel-twin versus a silky inline-four. The Aprilia’s 659cc parallel-twin with a 270-degree crank is the heart of its aggressive character. This design provides a power delivery that feels immediate and muscular in the low and mid-range, perfect for firing out of corners. The Honda’s 649cc inline-four is the epitome of smoothness and linear power. It builds revs progressively and rewards you with a thrilling top-end scream, a signature trait that Honda has perfected over decades.

The Italian Twin’s Gutsy Punch

Think of the RS 660’s engine as a street fighter. It’s eager, responsive, and always feels ready to play. The torque curve is fat and accessible, meaning you have usable power right from 4,000 RPM. This makes it a monster on tight, twisty roads where you’re constantly on and off the throttle. You don’t need to dance on the gear shifter to stay in the powerband. Wait, that’s not quite right. You *can* dance on the gear shifter, and its standard up/down quickshifter makes it incredibly rewarding, but you don’t *have* to.

Honda’s Screaming Four-Cylinder Soul

The CBR650R’s engine is more of a grand touring symphony. It’s docile and friendly below 6,000 RPM, making it a much more pleasant companion for commuting or relaxed rides. But once you cross the 8,000 RPM mark, its personality completely changes. It comes alive with a wail that’s pure motorsport. This engine rewards a rider who loves to use the entire rev range, building up to a crescendo. I have a fond memory of riding a CBR650R through a long tunnel, holding it in second gear just to hear that glorious inline-four echo off the walls. It’s an addictive sound that a twin just can’t replicate.

Why Does the Aprilia Feel So Much Sharper?

The Aprilia RS 660 feels sharper because it was fundamentally designed as a track-capable sportbike, not a sport-tourer. Its aggressive geometry, high-spec adjustable suspension, and significant weight advantage contribute to a telepathic handling experience. The Honda CBR650R, while competent, is built with a bias towards road comfort and stability, making it feel less immediate in its responses.

The chassis tells the tale. The Aprilia uses a lightweight aluminum twin-spar frame with the engine as a stressed member, a design philosophy borrowed directly from its bigger RSV4 sibling. This results in incredible rigidity and feedback. The Honda uses a more conventional steel diamond frame, which is perfectly capable but lacks that razor’s-edge feel. Combine this with the RS 660’s fully adjustable Kayaba suspension (the Honda only has preload adjustment on the rear), and you have a machine that can be tailored precisely to the rider and the road—or track.

Can Electronics Bridge the Performance Gap?

No, the electronics don’t bridge the gap; they widen it significantly in Aprilia’s favor. The RS 660 comes equipped with the APRC (Aprilia Performance Ride Control) suite, a comprehensive package of rider aids lifted from superbikes. This includes multi-level traction control, wheelie control, cruise control, engine brake control, multiple engine maps, and cornering ABS. It’s a full-fat electronics package that allows a rider to exploit the bike’s performance with a massive safety net.

The Honda CBR650R is far more spartan. It features standard ABS and Honda Selectable Torque Control (HSTC), which is essentially a basic traction control system you can turn on or off. That’s it. While HSTC is effective at preventing gross wheelspin in slippery conditions, it lacks the sophistication and refinement of the Aprilia’s system. When I tested these bikes back-to-back, the Aprilia’s up/down quickshifter was a revelation. It allows for seamless, clutchless shifts that keep the bike settled and driving forward, something that gives a tangible advantage on a fast road or circuit. The Honda requires the old-fashioned method for downshifts, which feels archaic by comparison.

What Do the Raw Numbers Mean for the Everyday Rider?

For the everyday rider, the raw numbers translate into two very different street experiences. The Aprilia RS 660 is the more thrilling, engaging, and ultimately more demanding partner. The Honda CBR650R is the dependable, comfortable, and more versatile all-rounder. Your choice depends entirely on what you prioritize in a motorcycle.

If your rides consist of weekend blasts down challenging backroads and the occasional track day, the RS 660 is almost impossible to beat in this category. Its immediate punch, lightweight agility, and sophisticated electronics make it feel like a surgical instrument. It constantly eggs you on. However, its committed riding position can become tiresome on longer journeys, and its engine character can feel a bit snatchy in stop-and-go traffic.

The CBR650R is the bike you could genuinely live with every day. Its smoother power delivery makes city riding a breeze, and its more relaxed ergonomics mean you can comfortably ride for hours. It’s the sensible choice that still knows how to have fun when you ask it to. What most people overlook is the Honda’s build quality and perceived reliability—it feels indestructible, a trait that provides immense peace of mind for high-mileage riders.

So, Which One Is It?

This decision isn’t about which bike is objectively ‘better’. It’s about which bike is better for *you*. I’ve seen riders buy the Aprilia for its exotic looks and performance, only to sell it a year later because it was too focused for their daily commute. Conversely, I know riders who chose the Honda and now wish for the edgier performance and premium tech of the Italian machine.

Imagine you’re at the base of a mountain pass. The road ahead is a ribbon of fresh asphalt, filled with hairpins and fast sweepers. If your first thought is to attack every corner, chasing apexes and feeling the electronics manage your drive out, you’re an RS 660 rider. If your thought is to enjoy the climb, flowing smoothly from corner to corner while listening to that glorious engine sing, and then comfortably riding another two hours home, you belong on the CBR650R. As manufacturers continue to push the boundaries of the middleweight class, it’s this choice between focused performance and refined usability that will likely define the next generation of sportbikes.