[3] The Dubonnet suspension featured an independent coil spring and shock absorber system that traded durability for a reduction of unsprung weight and increased comfort.

[7] At a test at the Autodrome de Linas-Montlhéry in 1936, the Dolphin achieved a 35% higher top speed and 25% better fuel economy than a contemporary Ford with the same engine, demonstrating the importance of aerodynamics in design to the Automobile Club of France.

[4] The Xenia showcased the Dubonnet independent suspension of the earlier model alongside the streamlined aerodynamics of the later Dolphin, resulting in a car again designed with the help of Andreau with a body built by French coachbuilder Saoutchik.

[10] The engine produced 160 hp (119 kW) at 3,050 rpm,[11] able to propel the car to an estimated top speed of around 110 mph (177 km/h) thanks to the slippery aerodynamics of the body.

This design was intended to improve the comfort and smoothness of the ride, with Dubonnet claiming the system had "the suppleness of a cat", and likening the experience of driving the car to floating on air.

These details include the wraparound windshield, the large slatted grill extending below the long hood, and the unconventional rear-hinged doors that operated by sliding out and back towards the rear of the car.

Notably, the Dubonnet Xenia has fender skirts that cover almost the entirety of the rear wheels to reduce drag, a technique pioneered 10 years earlier on a land speed record attempt car.

After being restored again by its new owner, the Dubonnet Xenia was displayed at the 2000 Pebble Beach Concours d'Elegance where it won the award for 'Most Elegant Enclosed Car'.