Which one has more energy content?

Question

Which one has more more energy/more powerful? Which one provides more energy/power/efficiency or How should I question this?

1) So, Is hydrogen gas (H2) more powerful or gasoline? which one?

2) And Is hydrogen gas (H2) more powerful or diesel? which one?

Answer 1

Petrol and diesel have by far more stored chemical energy than hydrogen.

Answer 2

Obviously both gasoline and diesel have more energy as they are chain compounds with high molecular weight