this post was submitted on 13 Oct 2025
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Ok, lets assume an efficiency of 35%.
That means 3500Wh usable energy per liter of diesel.
A complete 500Wh charge of my ebike gets me ~70km at 20km/h without any pedaling (tried that out).
So the usable energy delivered by one liter of diesel would be sufficient to drive me and my bike a distance of 7*70km = 490km.
A person won't be able to sustain 20km/h on a bike with the same low effort as walking at 5km/h, but even if that was the case, in 8h this would only get him 160km far.
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Edit:
Looked up some numbers for bicycling.
Driving 20km at ~20km/h burned energy is generally given in the range ~500kcal, meaning 580Wh.
That is better than I expected, as the 10kWh primary energy would get you ~350km far, so almost as good as the diesel engine.
(To be fair: this doesn't yet take into account the CO2 footprint of food production, which is really abysmal. But that's a different topic.)