Harley-Davidson Fat Boy vs Harley-Davidson Heritage Classic

The Harley-Davidson Fat Boy (2025) and the Harley-Davidson Heritage Classic (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 Fat Boy is a cruiser with 1,923 cc, 103.3 hp and 315 kg; the Harley-Davidson Heritage Classic is a cruiser with 1,923 cc, 91.2 hp and 326 kg. Power-to-weight with the rider: 264.8 hp/ton versus 227.4 hp/ton. On this measure the Harley-Davidson Fat Boy is 16% ahead.

In the simulation the Harley-Davidson Fat Boy covers 0-100 km/h (speedometer) in 3.54 s and the Harley-Davidson Heritage Classic in 3.78 s; the Harley-Davidson Fat Boy is quicker by 0.23 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 Fat Boy (ABS unknown, class assumption: no ABS) and 49.1 m for the Harley-Davidson Heritage Classic (ABS unknown, class assumption: no ABS). Calculated top speed: 201 km/h (estimated from power and drag) versus 194 km/h (estimated from power and drag).

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 both. Open the interactive app (currently in Turkish) to watch the run side by side and change the load.