[gallery link="none" columns="1" size="full" ids="43146"] source: ABT Sportsline Ten years since the production launch of the first Audi A7, the new RS 7 Sportback culminates the series with an unprecedented performance boost. The developers have coaxed 600 hp (441 kW) and 800 Nm from the 4.0-litre V8 turbo petrol engine – that’s 40 hp (29 kW) more than its predecessor. ABT Sportsline however, saw considerably greater potential within the coupé-like silhouette with high-tech suspension. The...