BEST OF THE REST

The Porsche 718 Spyder (left) is essentially a drop-top Cayman GT4, while the 718 Boxster GTS 4.0 is essentially a cut-price 718 Spyder. The Aston Martin Vantage Roadster bests the 911 Cabriolet for character, while the Caterham Seven remains an exemplar of sports car purity whatever the model.