Power-to-weight ratios plus an estimated quarter-mile time and trap speed.
Use crank power in hp, kW or PS/CV.
Kerb weight in kg or lb (add driver/fuel for a realistic figure).
Get hp/ton, W/kg and an estimated quarter-mile time and trap speed.
With Roger Huntington's well-known formula: ET = 5.825 × (weight_lb ÷ hp)^(1/3), and trap speed = 234 × (hp ÷ weight_lb)^(1/3). It assumes good traction and is an estimate, not a guarantee.
Hot hatches sit around 150–200 hp/ton; serious sports cars 250–350 hp/ton; supercars 400+ hp/ton.
The estimator assumes crank/flywheel power. If you only have wheel power, add roughly 12–18% for drivetrain loss before entering it.
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