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Audi’s Neckarsulm Factory Celebrates 150 Years with Electrified Homage to NSU: Meet the EP4 EV Concept

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Source: Neckarsulm, Company, Audi MediaCenter

Audi’s Neckarsulm factory in Germany, celebrating its 150th anniversary, has unveiled a remarkable one-off EV concept, the EP4 (Electric Prinz 4). Crafted by apprentices, this project pays homage to NSU, the former occupant of the site, and commemorates the factory’s milestone. The original NSU Prinz 4L, a compact two-door sedan from 1971, underwent a stunning transformation, with a team of 12 trainees electrifying the classic car. The EP4 boasts a powerful 240 hp electric motor sourced from the Audi e-tron SUV. The motor replaced the Prinz 4L’s original 30 hp two-cylinder engine. Instead of the massive battery found in the e-tron, the EP4 utilizes a smaller unit from the plug-in hybrid Audi Q7 TFSI e quattro, occupying the space where the fuel tank was originally located.

To accommodate the increased horsepower, the apprentices modified the floor pan, brakes, and axles of an Audi A1, ensuring a seamless fit. They employed 3D printing to create unique interior components, such as custom instruments and displays. The computerized displays present essential information like remaining charge and speed, while also performing diagnostic functions.

“The project gave our apprentices a chance to work freely with different techniques and materials. For example, in addition to the electric drive, they used 3D printing, a second technology of the future. Carbon fiber – familiar from motorsport – was also used for the front hood. In the case of EP4, the vision and deadline were very ambitious. It’s great to see how the junior staff have grown with their task and what a leap in development they have made as a team.”
-Timo Engler, Head of Training Vehicle Technology/Logistics


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The EP4’s exterior, designed at Audi’s Neckarsulm, underwent extensive modifications, widening the body and incorporating 3D printed fender flares. The designers retained the original car’s distinctive lines while updating the rest. The car received a stunning paint job in Suzuka Grey and Brilliant Black, with a Signal Yellow rear wing. Inside, the minimalist cabin features Recaro Podium seats and a Signal Yellow roll cage. Carbon fiber adds a motorsport touch to the EP4’s front hood.

“With admirable commitment and considerable creativity, our apprentices have built a tremendous car. They can be really proud of the result. Projects like this show that our company has a strong future thanks to our young talent.”
-Xavier Ros, Audi Board Member for Human Resources

This unique creation signals Audi’s technological prowess and its ability to blend the past with the future, showcasing the brand’s commitment to innovation and sustainability.

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