What's a good power-to-weight ratio?
As a rough guide for hp per tonne: a warm hatch sits around 120–160, a proper hot hatch / sports car 200–250, a serious performance car 300+, and supercars 400–600+. Shedding weight is often cheaper than chasing power — and it improves braking and cornering too.
FAQ
Should I use crank or wheel power?
Be consistent. Manufacturers quote crank power, so for comparisons use crank. If you only know wheel hp, your real-world ratio is a little lower than the headline.
Kerb weight or with driver?
Headline figures use kerb (empty) weight. Add ~75–90 kg for a driver if you want the "as driven" number.