The V10 TDI is Volkswagen's 5.0 litre ten cylinder turbodiesel, launched in the early 2000s for the Phaeton saloon and Touareg SUV. It became famous for its enormous torque, with a Touareg version famously towing a Boeing 747 in a publicity demonstration. Production ended as smaller, cleaner diesels replaced it, but recordings of its distinctive revs kept circulating among car enthusiasts online. Clips are still shared in forums, edits and soundboards because few road diesels sound this deep, smooth and unusually close to a performance engine.