4. Citroen Hypnos

This is the Citroen Hypnos concept car, a fine-looking machine which could form the basis for a crossover-car based around the C5 as early as next year.

It has a hybrid drivetrain that Citroen is calling Hymotion, which uses a diesel engine to power the front wheels and an electric motor to drive the rears, giving four-wheel drive.

Coupled with the electric motor, the 200bhp engine returns 62.7mpg and emits 120g/km of CO2.

While the exterior styling is expected to make production, the interior, which features coloured lighting to appeal to different moods, is not.