1. What is BHP Per Tonne?

BHP (Brake Horsepower) per tonne is a measure of a car's power-to-weight ratio. It indicates how much power is available for each tonne of the vehicle's weight, which directly relates to acceleration performance.

2. How Does the Calculator Work?

The calculator uses the BHP per tonne formula:

Where:

• \( \text{BHP} \) — Brake horsepower of the vehicle
• \( \text{Weight} \) — Vehicle weight in kilograms

Explanation: The formula converts the weight from kilograms to tonnes (by dividing by 1000) and then divides the power by this value to get power per tonne.

3. Importance of BHP Per Tonne

Details: BHP per tonne is a key performance metric that helps compare vehicles of different sizes and weights. Higher values indicate better acceleration potential.

4. Using the Calculator

Tips: Enter the vehicle's BHP (brake horsepower) and weight in kilograms. Both values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a good BHP per tonne value?
A: Values vary by vehicle type. Economy cars: 60-90 bhp/tonne, Sports cars: 100-200 bhp/tonne, Supercars: 200-400+ bhp/tonne.

Q2: How does BHP per tonne relate to acceleration?
A: Generally, higher BHP per tonne means better acceleration, though other factors like gearing and traction also play important roles.

Q3: Should I use curb weight or gross weight?
A: For performance comparisons, use curb weight (empty vehicle weight). For practical load capacity calculations, use gross weight.

Q4: How does this compare to torque per tonne?
A: Torque per tonne is another important metric, especially for low-end acceleration. Both metrics together give a complete picture.

Q5: Does this account for drivetrain losses?
A: No, BHP is measured at the engine. Wheel horsepower (after drivetrain losses) would give an even more accurate performance measure.