Bertone Cadillac Villa

With its low centre of gravity, long wheelbase and large wheels, the Villa rides impeccably. We can't rate its handling or performance yet, but as a showcase for future Cadillacs, the car's novel doors, extensive use of glass and mobile office credentials confirm the American maker's move towards luxury models for Euro executives.

Here's the clearest view yet of Cadillac's future direction. The US firm is working with European styling houses to raise its profile further and the inaugural result is the Bertone Villa, revealed at the Geneva Motor Show in March. And Auto Express is first to drive it.

Bertone built the car on a bespoke chassis which is close to the proportions of Cadillac's SRX. Although it is road legal, as a show model the Villa has only a small engine mated to a single-speed gearbox. It is not very fast, but the huge wheelbase and massive rear make for a spacious cabin. And, of course, the extensive use of glass in the bodywork helps to make the car a seriously interesting proposition.

The clamshell doors rise and pivot at the touch of a button on the centre console or keyfob. This exposes the interior completely, because the roof is incorporated into the moving panels.

Used - available now

2014 Mazda

3

34,100 milesManualPetrol2.0L

Cash £12,499

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Even with the doors shut, however, from the driver's seat you feel totally exposed to the outside world. The see-through surround would have to be polarised for a production version, as luxury buyers value their privacy. And they wouldn't appreciate getting slowly roasted on a hot summer's day, either.

On a more positive note, the front seats provide impressive shoulder and legroom, while passengers in the rear have lots of space for their legs, shoulders and head due to the use of independently adjustable reclining chairs. Another showpiece is the wireless keyboard in the back, which is linked to a screen incorporated into the small table in the armrest.

Add the indirect, soft blue mood lighting and vast 23-inch central front display screen, which monitors all the dashboard and driving functions, and the Villa can be a sleek rolling business centre when the need arises.

Because each door incorporates a significant section of overhead glass, accessing the cabin couldn't be easier, as there is no need to crouch or shuffle out of the seat. You simply stand up and step out: even the tallest basketball star can walk away. The design is also ideal for people with limited mobility. So while the Villa looks odd, it is highly practical. Let's just hope Cadillac takes some of these ideas to production.