BEST OF THE REST

The Aston Martin Vantage Roadster (left) bests the 911 Cabriolet for character, the Porsche 718 Boxster GTS 4.0 is essentially a cut-price 718 Spyder, the Caterham Seven remains an exemplar of sports car purity across the range, while the Ariel Atom strips what you need for driving thrills to the bare minimum.