Audacious IV: a British-built Audi Quattro with an RS4 V8, a manual and up to 10,000 rpm
A small Scottish workshop has rebuilt the Audi Quattro around the B7 RS4's 4.2-liter V8 and six-speed manual, with 600 or 750 hp supercharged versions and two 10,000 rpm engines planned above them. Only 50 will be built, from about $470,000 before taxes and extras, with first deliveries due in late 2027.