I have heard that cars can run on chocolate, if so, how does that work and how fast would the car be able to go?

Question: I have heard that cars can run on chocolate, if so, how does that work and how fast would the car be able to go?
- Keywords:
  energy,
  quirky,
  speed,
  technology
Asked by rosekverity to Colin on 26 Jun 2013.
- Colin Dick answered on 26 Jun 2013:
  
  I haven’t heard this! Maybe we’re missing a trick with this. We all know that chocolate has lots of energy because if we eat lots then we need to run around loads to burn the calories – so from this point of view, chocolate could possibly provide enough energy to move a car =) but I don’t think chocolate will replace petrol, because petrol has lots more energy in it and it’s better at exploding so we get all that energy released in a small time, which is how we get power from the engine.

Question: I have heard that cars can run on chocolate, if so, how does that work and how fast would the car be able to go?