Vauxhall has revealed its vision of a future sports car with the GT Concept at the Geneva Motor Show. Described as avant-garde in design the show car, sporting sister brand Opel badges, is shorn of handles and mirrors while the doors open into the front arches, using a space-saving and patented mounting. Powered by a 1.0-litre, 145PS turbocharged engine 0-62 takes less than 8 seconds, while top speed is 134mph.