Harley-Davidson Heritage Classic vs KTM 390 Duke

The Harley-Davidson Heritage Classic (2025) and the KTM 390 Duke (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 Heritage Classic is a cruiser with 1,923 cc, 91.2 hp and 326 kg; the KTM 390 Duke is a naked bike with 399 cc, 44.4 hp and 165 kg. Power-to-weight with the rider: 227.4 hp/ton versus 184.9 hp/ton. On this measure the Harley-Davidson Heritage Classic is 23% ahead.

In the simulation the Harley-Davidson Heritage Classic covers 0-100 km/h (speedometer) in 3.78 s and the KTM 390 Duke in 5.48 s; the Harley-Davidson Heritage Classic is quicker by 1.70 s. In the 100-0 km/h brake test, braking distance without the 0.3 s reaction time is 49.1 m for the Harley-Davidson Heritage Classic (ABS unknown, class assumption: no ABS) and 43.7 m for the KTM 390 Duke (with ABS). The KTM 390 Duke stops 5.4 m shorter. Calculated top speed: 194 km/h (estimated from power and drag) versus 167 km/h (test measurement).

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 Harley-Davidson Heritage Classic and model-specific parameters calibrated against published road tests for the KTM 390 Duke. Open the interactive app (currently in Turkish) to watch the run side by side and change the load.