Category: Performance
Power-to-Weight Ratio
The ratio of engine power to vehicle weight, typically expressed in HP per ton or kg.
Power-to-weight ratio determines acceleration potential. A 300 HP car weighing 1,500 kg has 200 HP/ton. Adding power or reducing weight improves the ratio. The Lotus Elise demonstrates how a 180 HP car at 900 kg can feel faster than a 400 HP car at 2,000 kg. This metric is why lightweight sports cars remain popular despite modest power figures.
Related Concepts
HorsepowerCurb WeightAcceleration