The 2018 Audi A3 e-tron is available as a 4-door, 5-seat hatchback. Starting at $39,500, the 2018 Audi A3 e-tron 1.4T Premium is powered by a 1.4L , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated The top of the line 2018AudiA3 e-tronTech , priced at $ 40,650 , is powered by a 1.4L , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated