On October 22, 2006 the Hohenester HS650 Nardo circled the high-speed test track at a speed of 213.7 mph (343.9 km/h). On December 1, 2006 the world's fastest Audi A4, equipped with an H&R coil-over sport suspension, celebrates its public world debut on the H&R stand at the Essen Motor Show 2006.

Tuning specialist Alfons Hohenester installed a twin-turbo V6 engine with an increased displacement of 3 liters under the hood of a visually discretely modified Audi A4 sedan. The engine was tuned by the company-own engine shop and produces a maximum power output of 650 bhp at 7,300 rpm and a peak torque of 531 lb-ft at 3,800 rpm.

That makes the Hohenester HS650 Nardo a force to be reckoned with not only when it comes to top speed: With sprint times of 3.4 seconds from rest to 62 mph, 10.3 seconds to 124 mph and 29.8 seconds to the 186 mph barrier the 4x4 delivers performance figures that only a very select few super sports cars can match. And it does so while meeting stringent Euro 4 emission limits.

To make safe use of this performance potential Alfons Hohenester relies on a height-adjustable H&R coil-over suspension: "The uneven and banked track in Nardo places extreme demands on the suspension at speeds above 180 mph. Together with our development partner H&R we found a great setup that made our HS650 Nardo absolutely safe and easy to drive. It was this combination of professionally tuned suspension, extremely powerful engine and modified aerodynamics that made our record possible."