New Singer ACS duo revealed with over 450bhp and rally inspiration

California-based Porsche restoration specialist Singer has revealed its latest creations: a pair of all-terrain models offering a 2021 interpretation of the 1980s World Rally Championship and Rally Raid racers made by Porsche.  The Singer ACS (which stands for All-terrain Competition Study) consists of a pair of rally-prepped machines that take inspiration from cars like the 911 SC/RS and 959