Harley-Davidson Nightster Special vs TVS Jupiter 125

The Harley-Davidson Nightster Special (2025) 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 Harley-Davidson Nightster Special is a cruiser with 975 cc, 88.5 hp and 225 kg; the TVS Jupiter 125 is a scooter with 125 cc, 8.1 hp and unlisted weight. Power-to-weight with the rider: 295.0 hp/ton versus 40.8 hp/ton. On this measure the Harley-Davidson Nightster Special is 624% ahead.

In the simulation the Harley-Davidson Nightster Special covers 0-100 km/h (speedometer) in 3.17 s and the TVS Jupiter 125 in 38.88 s; the Harley-Davidson Nightster Special is quicker by 35.71 s. In the 60-0 km/h brake test, braking distance without the 0.3 s reaction time is 17.7 m for the Harley-Davidson Nightster Special (ABS unknown, class assumption: no ABS) and 17.9 m for the TVS Jupiter 125 (ABS unknown, class assumption: no ABS). The Harley-Davidson Nightster Special stops 0.2 m shorter. The standard 60-0 test is used because one calculated top speed is below 110 km/h. Calculated top speed: 180 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 model-specific parameters calibrated against published road tests for both. 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.