this prototype does 6,200 km per liter

Think of an ultra-efficient car: how many miles could it go on a liter of petrol? Maybe 40, or even 50? Already very high values ​​compared to what we are used to, but if you look at the prototypes the numbers grow dramatically. Yet officially, no one can come close to Maxwell.

Yes, because the Guinness World Record for the most efficient prototype vehicle ever goes to him, Maxwell, who in 2018 during a special test recorded a consumption of 0.01614 liters / 100 km, equal to 6,196 km with one liter of petrol.

Lightweight and aerodynamic

Manufactured by Duke Electric Vehicles, a team of students from Duke University in Benson (Arizona, USA), Maxwell was built for the Shell Eco Marathon – a global academic program focused on reducing carbon emissions through better energy use. which has been held for 35 years.

The Maxwell in size is little longer than a person (not very tall) lying down, with wheels: it is effectively a capsule-shaped tricycle that maximizes aerodynamics and, with the use of special materials, can only weigh 26 kg.

Although the name of the company may be misleading, in reality the Maxwell is a “hybrid heat engine”. Yet it doesn’t use gasoline: its propulsion system is a pure hydrogen, thanks to which he managed to snatch the record. Officially this is a classic Fuel Cell system, where hydrogen fuel cells generate electricity to power an electric motor – basically it is an electric where the energy is stored in a hydrogen tank rather than a battery.

Once the test was completed, the result was translated into more understandable terms by converting from hydrogen to unleaded 95 octane petrol (RON 95). The result is therefore a journey of almost 6,200 km on a single liter of petrol. For comparison, it means that in theory it could do the around the globe at the equator – about 40,000 km – with less than 6.5 liters of petrol.

What about road cars?

The value achieved by the Maxwell is astounding, and not surprisingly it has earned the record, but of course a traditional car approved for the road it can’t even come close to a similar value for a variety of reasons – starting with its size and higher weight.

Yet, over the years, road models have achieved ever higher levels of efficiency. Today it is not so difficult to find 30 km / l petrol city cars, or methane models that can travel more than 35 km with one kilogram of natural gas. To get an idea, you can look at the 2021 ranking of cars that consume less, divided by type of power supply.

If, on the other hand, we are talking about electric Things change. In the ranking you will also find the EV category, but on these it deserves an in-depth study to really see the difference between what is declared and their real behavior on the road: this is why we have created a maxi-test video on the Grande Raccordo Anulare of Rome, turning up to the end of the autonomy of each model.


Source: Motor1.com Italia – News by it.motor1.com.

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