you want a V8, preferably one about 5 liters. you see, most large engines are bad for the environment, but when they get to a certain size they tend to burn up excess carbon emissions and are actually more eco-friendly.
The Audi is probably in good shape, but if you plan on having it for a long time, don't get it. The Corollas are pretty ugly, but there's other cars like it that you an buy.