Although the BMW 550e and AMG E53 Hybrid use similar PHEV powertrains, they have totally unique personalities. It's wild to think how advanced, capable and efficient both of these vehicles are.

It was not fitted to our test vehicle. In terms of rivals, the BMW M550i sedan is identically priced, while the Mercedes-AMG E53 sedan is much more expensive, at $173,800. The S6 sedan arguably has ...

Power is sent to four wheels via BMW ... S6’s 3-litre V6 turbo diesel powertrain is deeply underwhelming, and in the company of the 523bhp M550i seems more than meek with its 344bhp. AMG ...

Audi’s £60,190 S6 TDi is powered by a MHEV V6 diesel ... on top for any meaningful chassis tech to match that of the BMW and AMG. Used Audi RS6 Avant (C7, 2013 - 2019) review, specs and ...