The challenges are the same as with most journeys: speed and efficiency. (pnnl.gov)
Don't expect to achieve those numbers in real - world driving, but over most journeys the diesel should sip significantly lower quantities of fuel than the petrol. (evo.co.uk)
It's fast then, and the claimed range of 409 miles (only a pinch of salt required here) means you can contemplate most journeys without breaking out into a flat battery - induced sweat, but is it fun. (evo.co.uk)