An electric sportscar developed by British engineers finished a remarkable road trip on the Panamerican Highway, travelling from near the Arctic Circle in Alaska to the world’s southernmost city without a single blast of carbon dioxide emissions.

Developed by engineers from Imperial College London, the SRZero sportscar ran on lithium iron phosphate batteries powering two electric motors with a peak output of 400 horsepower during its 26,000-kilometre journey.

Powering up was a joy at times, the team said – such as in Chena Hot Springs, Alaska, where they started their trip on July 3 after charging the batteries using geothermal energy.

“The SRZero was literally being charged from energy taken straight out of the earth with absolutely zero CO² emissions,” Alex Schey, a mechanical engineer who organised the trip, wrote in his blog that day.

Finding places to plug in along the way became a major challenge as the team passed through 14 countries in 70 days of driving. But every time the driver hit the brakes – and there was plenty of that as the team made its way through the Rocky Mountains, Mexico and Central America and then through South America – the car recovered kinetic energy, extending its capacity to drive as much as six hours and more than 400kilometres on a single charge.

This was no clunky science project – all that horsepower enabled the car to reach 96 kph in just seven seconds and reach top controlled speeds of 200 kph, the team said. It pulled into the city of Ushuaia, in Tierra del Fuego, on Tuesday .

“We have made it – we are in Ushuaia! so many emotions, so many people to thank. It has been two absolutely incredible years...” the team tweeted, posting a picture of the car outside the local customs office.

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