1955 Audentia Serena
The first car ever produced by Audentia, the Serena, was appropriately named after his wife, the one thing people jokingly say he cared about more than his company. Sigurd is quoted saying “the car, much like my wife, is beautiful, has wide rims, and is low-maintenance.” The Serena has a 3.5L V8 twin carburetor engine, with all 255 horsepower going to the rear wheels. The car was truly magnificent to see, especially on the roads and side streets of post-war Germany.
The engine was designed completely by Sigurd and Burnie Reiner. The first iteration of the engine, the Mk1, was too big and too powerful for the kind of car Audentia was trying to create. That is why the name of the engine is the Mk2. Only one version of the car is known to exist with the Mk1 engine and it is priced over $1,500,000. The Mk2 produced 255 horsepower at 5500 rpm and 243 ft-lb of torque at 5300 rpm.
The Serena was produced from 1955-1958. Today, only 29 of the 390 cars exist today, and of those 29, 21 of them belong to museums and private collectors.