Harley-Davidson Sportster S vs TVS Jupiter 125

The Harley-Davidson Sportster S (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 Sportster S is a cruiser with 1,252 cc, 120.7 hp and 228 kg; the TVS Jupiter 125 is a scooter with 125 cc, 8.1 hp and unlisted weight. Power-to-weight with the rider: 398.3 hp/ton versus 40.8 hp/ton. On this measure the Harley-Davidson Sportster S is 877% ahead.

In the simulation the Harley-Davidson Sportster S covers 0-100 km/h (speedometer) in 2.97 s and the TVS Jupiter 125 in 38.88 s; the Harley-Davidson Sportster S is quicker by 35.91 s. In the 60-0 km/h brake test, braking distance without the 0.3 s reaction time is 16.1 m for the Harley-Davidson Sportster S (with ABS) and 17.9 m for the TVS Jupiter 125 (ABS unknown, class assumption: no ABS). The Harley-Davidson Sportster S stops 1.8 m shorter. The standard 60-0 test is used because one calculated top speed is below 110 km/h. Calculated top speed: 194 km/h (manufacturer claim) 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.