Audi’s iconic R8 sports car was introduced in 2006, followed by a facelift in 2012.The new second-generation R8 was spotted undergoing testing at Germany’s Nurburgring race track sporting minimal camouflage. IMAGE GALLERY: 2014 Audi R8 (Spy)The new sports car will be easier to notice courtesy of its angular style and modern tweaks in-line with current-generation Audis. The interior will be similar to the TT concept revealed earlier in 2014. The new R8 has a mid-engine platform, one also used in the Lamborghini Huracan though it has not been confirmed what will power Audi's next sports car. Rumour has it that it will use a version of the RS7's twin-turbo V8 and a non-turbo V10. A plug-in hybrid will be available. Engines should be mated to the automaker’s S-tronic seven-speed dual-clutch auto gearbox though a six-speed manual is in the works.The second-generation Audi R8 will be launched in 2015.