But for the purest engine experience, displacement has no replacement. All other methods are simply attempts to artificially recreate the benefits of displacement.
All they need now is to bring back the A2 to finish the line up off
A saloon A1 and A2 oh and a saloon R8 just for good measure
So Audi will now have a A3/4/5/6/7/8 which all look near enough the same but each model slightly larger and more expensive.