Audi S8 Plus and RS7 Performance US Prices Announced, and They Don’t Come Cheap

Audi has given the S8 sporty limousine and RS7 even sportier four-door coupé new models each, with the first getting the “plus” designation while the latter is called “performance.” Both models share the same engine – a 4.0-liter TFSI V8 unit capable of delivering 605 hp and 516 lb-ft (700 Nm). That’s an 85 hp increase in power over the outgoing S8, which means even more impress…