RKS RZ125 vs TVS Jupiter 125

The RKS RZ125 (2026) and the TVS Jupiter 125 (2025) are compared with the same Moto Kıyas physics model under identical conditions: flat dry asphalt, no wind, a 75 kg rider and no passenger. The RKS RZ125 is a sport bike with 125 cc, 14.5 hp and unlisted weight; the TVS Jupiter 125 is a scooter with 125 cc, 8.1 hp and unlisted weight. Power-to-weight with the rider: 63.8 hp/ton versus 40.8 hp/ton. On this measure the RKS RZ125 is 57% ahead.

In the simulation the RKS RZ125 covers 0-100 km/h (speedometer) in 13.42 s and the TVS Jupiter 125 in 38.88 s; the RKS RZ125 is quicker by 25.46 s. In the 60-0 km/h brake test, braking distance without the 0.3 s reaction time is 13.1 m for the RKS RZ125 (with ABS) and 17.9 m for the TVS Jupiter 125 (ABS unknown, class assumption: no ABS). The RKS RZ125 stops 4.8 m shorter. The standard 60-0 test is used because one calculated top speed is below 110 km/h. Calculated top speed: 125 km/h (estimated from power and drag) versus 91 km/h (manufacturer claim).

All values are an estimated simulation, not road-test measurements. Technical data comes from the sources listed below; the model uses class-average calibration (no accepted model-specific road test) for the RKS RZ125 and model-specific parameters calibrated against published road tests for the TVS Jupiter 125. Missing manufacturer data (weight) is estimated by class regression, not measured. Open the interactive app (currently in Turkish) to watch the run side by side and change the load.