Video: Rolls-Royce tests opinion with the electric 102EX concept

Could the Phantom Experimental Electric or 102EX, be the most relaxing and green Rolls-Royce ever? Well, Rolls-Royce cars are known for their refined drive and it has what's reckoned to be the biggest battery pack of any car.

The batteries add weight and this Phantom is 150kg more than standard, but don't go thinking this Rolls is a slouch as it boasts 390bhp, with 60mph coming up in just 5.7 seconds.