Audi A6, A7, A8, Q5 plug-in hybrids revealed

Audi has revealed its new range of plug-in hybrids, based on various model lines including the A6, A7, A8 and Q5. Set to make their public debut at the Geneva motor show next week, the four new PHEVs are badged 'TFSI e' – the company will reserve the 'e-tron' monicker for all-electric models from here on.