How can I compare running costs for petrol, diesel, electric and hybrid?

I want to buy a used car for my company. How to work out the fuel / electric cost so I can compare?

Looking for the best commuter car for the motorway, what are my options?

I am working away from home, about 130 mile commute one-way that I do one round trip a week. Based on your website I bought a 2015 Honda Civic. I absolutely love it. Fun, sporty and great on the consumption...