Audi A3 sedan Audi will showcase its A3 sedan at the auto expo. The A3 sedan will be launched sometime later this year so the Expo will be a good platform for Audi to display the car to the Indian audience. The A3 sedan will rival the Mercedes CLA class sedan that slots under the C-Class. The upcoming car looks much like a slightly shrunken A4. It is likely to come with a 1.8-litre TFSI petrol engine and a 2.0-litre diesel motor in India. You can also expect the A3 sedan with the usual S-tronic dual-clutch gearbox as until recently, all Audi sold in India were automatics.