We're here to put the 2014 BMW 4 Series coupe through its paces, and we'll have the chance to sample the updated 2014 BMW M5 with its new Competition Pack, as well.

Which German coupe delivers the better performance experience — the Audi S5 or the BMW 435i? This side-by-side review features onboard test drives of both cars on the Autobahn, showcasing ...