Named after the race track curve at Spa and based on the chassis of the Mercedes CL, the tuning specialist, Carlsson, has produced the most powerful executive saloon on the market. The 6.5 litre, V12 engine produces more the 700 bhp, with a 0-60 sprint in just 3.9 seconds, an astronomical score for a car that weighs twice the average hot hatch. The FI carbon fibre body kit ensure the weight is kept to a minimum but expect no change from £300,000. At the other extreme is the practical and reasonably priced Citroën C5 Tourer, doe to be launched in Britain next month (April) . The restyled exterior not only makes the C5 more attractive than its predecessor but with load space to match the best in class. Prices to start £15,500. On this clip you can also see the Mitsubishi iEV and the crazy Rinspeed sQuba concept.