Top Speed Estimator
Estimate a vehicle's theoretical maximum speed from horsepower, weight, aerodynamic drag coefficient, and frontal area.
Theoretical Top Speed
1922 mph
Metric
3093 km/h
Typical Drag Coefficients
| Vehicle Type | Cd Range | Frontal Area (ft²) |
|---|---|---|
| Sedan | 0.27–0.33 | 22–24 |
| SUV | 0.35–0.45 | 28–32 |
| Sports Car | 0.28–0.35 | 19–22 |
| Truck | 0.40–0.50 | 30–38 |
| Supercar | 0.30–0.36 | 17–20 |
💡 How to Use the Top Speed Estimator
How Top Speed Is Determined
A vehicle's top speed is reached when engine power equals aerodynamic drag. At high speeds, drag increases with the cube of velocity — doubling your speed requires 8× the power. This is why going from 150 to 200 mph requires massively more HP than going from 100 to 150.
The key factors are: engine power (HP), drag coefficient (Cd), frontal area, vehicle weight, and rolling resistance. For most road cars, aerodynamic drag is the dominant limiting factor above 100 mph.
Drag Coefficients of Popular Vehicles
| Vehicle | Cd | Top Speed |
|---|---|---|
| Tesla Model 3 | 0.23 | 162 mph |
| Toyota Camry | 0.28 | 135 mph |
| Ford F-150 | 0.45 | 107 mph |
| Porsche 911 | 0.29 | 182 mph |
| Bugatti Chiron | 0.35 | 261 mph |