341bhp 2.9 sec 278mph Pagani Huayra BC 6.0-litre twin-turbo V12 754bhp 3.2 sec 235mph Porsche 918 Spyder 4.6-litre V8 hybrid 875bhp 2.6 sec 214mph GMA T.33 4.0-litre V12 607bhp N/A N/A Ferrari ...