Robert Llewellyn test drives 'the most fuel efficient production car in the world' according to VW.
Volkswagen made big claims about the efficiency of their purpose-built XL1 diesel-hybrid. They claimed the car was good for 314 mpg, which equates to 0.9 l/100km in the Metric system.
However, at a test drive event organized by VW last July, a handful of journalists were given the chance to drive the mid-engined XL1 and results ranged from 160 to 200 mpg.
