Geneva Preshow: AC Schnitzer Turns the BMW 550i into the 540HP ACS5 Sport S Saloon

AC Schnitzer has prepared two production ready concept cars for this year's edition of the Geneva motor show. We've already told you about the first car, the diesel-powered 99d that is based on the BMW Z4 roadster, so here's the tuning firm's second proposal. The ACS5 Sport S Saloon is based on the latest BMW 550i sedan and is said to feature numerous performance and styling upgrades, though AC