The R8 is loosely based off of the Lamborghini Gallardo platform, and is powered by either a 420-hp 4.2-liter V-8 engine borrowed from the RS4, or the 5.2-liter V-10 borrowed from the Gallardo, making 525-hp in this application. Both engines are available in either coupe or convertible (Spyder) form. A full-time quattro all-wheel drive system puts that power to the ground and a choice between either a 6-speed manual transmission or an R-tronic automated sequential manual transmission give the driver full control. Standard features include things like satellite radio, Alcantara/leather sport seats, 19-inch alloy wheels, and bi-xenon headlights (full LED headlights on the 5.2). Options include a rearview camera, hill hold assist, navigation system and a Bang & Olufsen audio system.For 2012, a new lightweight limited edition GT model has been added to the line-up. It packs a 560-hp 5.2 V-10, R-tronic transmission and a generous amount of carbon fiber for weight reduction. Only 90 units of each bodystyle will be available in the US.