Struggling to decide which sports car to test why not try taking six for a spin on the open road the six vehicles used in the treasure hunt are a hmc mk iv a tvr griffith an e type jaguar a porsche 911 targa a morgan 8 and an aston martin db7 the experience starts with registration and coffee followed by a full briefing and issue of time schedules and suggested routes afterwards in teams of two alternate between driving and navigating as you scour the beautiful hertfordshire countrys