The A6 e-tron sedan is based on the new Premium Platform Electric (PPE) architecture, which will also underpin the upcoming Q6 e-tron SUV as … New Models 2022 Audi Q4 e-tron Finally Debuts as CAR magazine UK reviews the new Audi Q4 e-Tron SUV with pictures, specs and verdict Q4 50 e-Tron quattro costs £10k less than the base full-size e-Tron SUV, which is 300mm longer but not QS3oqa.