The Equus is powered by a sophisticated 429-hp Gasoline Direct Injection (GDI) V8 engine that delivers more standard horsepower than the Lexus LS460 and Audi A8. And it's quite a bit of space to enjoy, seeing as the Equus has more interior volume than the Lexus LS460 and BMW 750i. And Equus was the first luxury vehicle to offer this service