Breadcrumb Home February 11, 2009 12:00 AM 2009 Audi S8 Quattro needs tech refresh Tweet Share Share Email More The 2009 Audi S8 Quattro has a simple, basic navigation system. The tech needs an update, and HD radio is not available yet. The car has a 5.2-liter V-10 engine and 450 horsepower. The base price is $92,500. View the discussion thread.