THE A8 is Audi’s uber luxurious limo, the range-topping sedan that competes with BMW’s 7 Series and the Mercedes-Benz S-class., , It’s spacious, full of top-shelf materials and has all the latest and greatest technological marvels., , Audi is launching the fourth-generation version of its super-luxury model, kicking off with the 4.2-litre V8 model., , The new model isn’t cheap at $225,904, but still undercuts equivalent models from BMW and Mercedes.