2026 Aprilia RS 125 vs 2026 KTM RC 125 - Spec Comparison
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2026 Aprilia RS 125
The 2026 Aprilia RS 125 is a lightweight sport bike engineered for beginner and intermediate riders seeking an accessible entry into sportbike performance. Powered by a 124cc liquid-cooled four-stroke engine delivering 14.8 horsepower, it combines nimble handling with modern electronics and a six-speed gearbox. Known for its aggressive styling and track-ready ergonomics, the RS 125 excels as an affordable platform for developing riding skills.
2026 KTM RC 125
The 2026 KTM RC 125 is a fully faired sports bike for learners on a 125 licence. Its liquid-cooled 124.7cc single makes 15 hp and 12 Nm through a six-speed gearbox. ABS and a windscreen are standard, with an 824 mm seat, a dry weight of 147 kg and a 13.7-litre tank.
2026 Aprilia RS 125 vs 2026 KTM RC 125: the key differences
Both are sport bikes, so this is a like-for-like choice.
- On paper the two are very closely matched - power, torque, weight and seat height are all within a few percent of each other, so fit, feel, equipment and price will decide it.
2026 Aprilia RS 125: A pint-sized track-styled sportbike built for spirited backroad riding, carving corners, commuting, and learning proper sport riding skills.
2026 KTM RC 125: A pint-sized sport machine for spirited canyon carving, commuting and track-day schooling, teaching real sportbike technique on low power.
| Specification | 2026 Aprilia RS 125 | 2026 KTM RC 125 |
|---|---|---|
| Other | ||
| Category | Sport | Sport |
| Color Options | Space White, Aprilia Black, GP Replica Black | White/Orange, Orange/Black |
| Comments | - | Windscreen. |
| Engine | ||
| Capacity: | 124.2 ccm (7.58 cubic inches) | 124.7 ccm (7.61 cubic inches) |
| Engine Type | Single, four-stroke | Single, four-stroke |
| Fuel Consumption | 2.60 litres/100 km (38.5 km/l or 90.47 mpg) | ✓2.40 litres/100 km (41.7 km/l or 98.01 mpg) |
| Bore x Stroke | 58.0 x 47.0 mm (2.3 x 1.9 inches) | 58.0 x 47.2 mm (2.3 x 1.9 inches) |
| Compression | 12.6:1 | 14.5:1 |
| Cooling System | Liquid | Liquid |
| Fuel System | Carburettor | Injection |
| Starting | Electric | Electric |
| Ignition | ECU Electronics Magneti Marelli MIUG4 ø 32 mm | Bosch EMS |
| Valves Per Cylinder | 4 | 4 |
| Lubrication System | Wet sump | Wet sump |
| CO2 Emissions | - | 56 CO2 g/km |
| Performance | ||
| Power | ✓14.8 HP (11.0 kW) @ 10500 RPM | ✓15.0 HP (11.0 kW) |
| Torque | 11.4 Nm (1.2 kgf-m or 8.4 ft.lbs) @ 8500 RPM | ✓12.0 Nm (1.2 kgf-m or 8.9 ft.lbs) |
| Power/Weight Ratio | 0.1028 HP/kg (wet) | 0.1020 HP/kg (dry) |
| Chassis & suspension | ||
| Frame | Aluminium perimeter | Steel trellis, powder coated |
| Front Suspension | Upside down hydraulic fork, 40 mm. | WP APEX 43 |
| Rear Suspension | Asymmetrical swingarm, monoshock absorber | WP APEX - Monoshock |
| Front Wheel Travel | 110 mm (4.3 inches) | 120 mm (4.7 inches) |
| Rear Wheel Travel | 120 mm (4.7 inches) | 150 mm (5.9 inches) |
| Rake (fork angle) | - | 23.5° |
| Ground Clearance | - | 158 mm (6.2 inches) |
| Transmission | ||
| Gearbox | 6-speed | 6-speed |
| Transmission Type | Manual | Manual |
| Final Drive | Chain | Chain |
| Clutch | Multiple discs, in oil bath | Wet multi-disc clutch, mechanically actuated |
| Brakes & wheels | ||
| Front Brakes | Single disc. ABS. Stainless steel disc with radial 4 piston calliper | Single disc. ABS. Four-piston radial fixed calliper. |
| Front Brakes Diameter | 300 mm (11.8 inches) | 320 mm (12.6 inches) |
| Rear Brakes | Single disc. ABS. Stainless steel disc and calliper with single 30 mm piston. | Single disc. ABS. Single-piston floating calliper. |
| Rear Brakes Diameter | 218 mm (8.6 inches) | 230 mm (9.1 inches) |
| ABS | Yes | Yes |
| Front Tyre | 100/80-17 | 110/90-R17 |
| Rear Tyre | 140/70-ZR17 | 150/70-R17 |
| Dimensions & weight | ||
| Wheelbase | 1350 mm (53.1 inches) | 1340 mm (52.8 inches) |
| Overall Length | 1968 mm (77.5 inches) | - |
| Overall Width | 760 mm (29.9 inches) | - |
| Overall Height | 1135 mm (44.7 inches) | - |
| Seat Height | ✓820 mm (32.3 inches) | 824 mm (32.4 inches) |
| Wet Weight | 144.0 kg (317.5 pounds) | - |
| Fuel Capacity | ✓14.50 litres (3.83 US gallons) | 13.70 litres (3.62 US gallons) |
| Reserve fuel capacity | 3.50 litres (0.92 US gallons) | - |
| Dry weight | - | 147.0 kg (324.1 pounds) |
"Best" (✓) reflects that single spec only, not overall suitability - a bike can win on paper and still be the wrong choice for you. Ties are all marked; specs with no clear better/worse direction (e.g. displacement, wheel size) are never marked, only tinted where bikes differ.
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This tool puts up to four motorcycles side by side across their full specification sheets, drawn from a database of 43,000+ models and 1.60M+ individual specifications. Wherever a spec has a clear "better" direction - more power, less weight - the strongest figure in that row is highlighted automatically.
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Specs are pulled from the same categories used throughout the site: engine and transmission (capacity, power, torque, gearbox), physical measures (weight, seat height, fuel and tank capacity), frame and dimensions, speed and acceleration, and brakes, suspension, frame and wheels (including tyres) - plus general information and maintenance data where it's on record for a bike.
How the highlighting works, and its limits
A highlighted cell means one bike has the clearly better raw number for that spec - more power, less weight, and so on. Fields where "better" genuinely depends on the rider - seat height above all - are deliberately never highlighted: a lower seat isn't automatically the right choice, it's a fit question only you can answer. Winning a row also isn't the same as winning the comparison - a bike can lead on paper in half the rows and still be the wrong bike for you.
Frequently asked questions
Can I compare bikes from different categories, like a scooter against a superbike?
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What happens if a spec is missing for one of the bikes?
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Are older model years included?
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