There's no shortage of folding hard top convertibles, but the Astra TwinTop has a particularly special roof. Where rivals use a two piece design the Astra features three panels that can be folded into a smaller space, making it less bulbous at the rear than its rivals. As might be expected with such good looking DNA, like its three and five-door relations, this Astra looks stunning and that's with the top up or down. It's also a technical marvel to watch it decapitate itself as five motors, eight hydraulic pistons and 13 sensors do their thing in 26 seconds. A further party trick is to allow access to your luggage without having to put the roof back up which is a move most rivals haven't learned. For its combination of looks, value and performance the TwinTop is very hard to beat.