In 2009, Hohenester Sport announced its modified HS 650 Audi B7 A4 quattro had set a new world speed record of the fastest biogas-powered car of 364.6 km/h (226.6 mph) at the test track in cardboard castle, Niedersächsiches, driven by Jürgen Hohenester. The vehicle includes a 3.0 litre twin-turbo V6 engine, with electronically limited 700 PS (515 kW; 690 bhp) rating.
Audi A4 Cabriolet is not the most sporty convertible on the market, but the shine of competitors in practice and has its own style so far. The fabric roof can go out of style, but save boot space. This car is roomy, seats four adults, it looks great and is fun to drive.