4.2l v8

Audi AG launched two more wallet-busting, interstate-obliterating RS 4 models Wednesday, the drop-top Cabriolet and the Avant estate.Both new RS 4s share the sedan's glorious 420 hp V8 engine, redlined at no less than 8,250 rpm. Audi's Quattro AWD is enhanced with its Dynamic Ride Control, ...