Let's compare fuel economy in methods of transportation. In these measurements, the lower numbers are for less fuel.First comparison in kJ per Km., as we are not always using gasoline as fuel.
- Walking 330 kJ per km (the fuel is food, in case you were wondering)
- Bicycling 120 kJ per km
- Toyota Prius 1600 kJ per km (Calculated from 5.1 L/100 km at 32,000 kJ per Litre)
Second comparison, switching to L/100 Km., but I included a Toyota Prius in both comparisons for a benchmark.
- Toyota Prius 5.1 L/100 Km (55 mpg US)
- Jet Aircraft 4.8 L/100 km (this is per passenger)
- Ocean Liner Ship 16.9 L/100 km (per passenger)
- Diesel Electric train 1.2 L/100 km (per passenger) (I got this from another site, as wikipedia was unclear about the units and passengers, also seemed unrealistic at 12 mpg for the whole train?)
Note that for two people to go across the country, the Prius would be more efficient than flying. But with only one person in the car and a full airplane, it is close to a tie. Again, if the aircraft is half empty, the Prius wins.
In this website Matti proves he can run his car for a year with less fuel than to fly two people from Toronto to Acapulco and back on a winter vacation. Part of the secret is that he has a VW Golf with only 12,000 km in one year. In this case it is appropriate to say YMMV.
YMMV, indeed!
ReplyDeleteAlthough it's interesting to compare 'fuel economy' by mode of transportation, the fact remains that global energy supplies are limited, and that transportation consumes '30 percent of world energy use and 95 percent of global oil consumption'.
Our 'globalized' economy is unsustainable ... regardless of whether you enjoy those warm Caribbean vacations or cheap consumer goods from China.
In simplest terms:
'... the question the world faces is no longer whether to reduce energy consumption, but how. [...] Transport systems will wither (especially ones relying on the most energy intensive vehicles — such as airplanes, automobiles, and trucks). Global trade will contract dramatically, as shipping becomes more costly. And energy dependent food systems will falter, as chemical input and transport costs soar. All of this could in turn lead to very high long-term unemployment and perhaps even famine.'