eli5: Difference between petrol and diesel?
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Petrol (or gasoline in the US) is more refined than diesel. Petrol is thinner and more volatile (meaning it evaporates faster) and it also burns faster, which means more horsepower. Diesel is thicker and has more energy stored in it (higher energy density), and it burns slower. Diesel engines work differently, they make more torque at lower RPM which is good for big heavy trucks.
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