A prototype of the 2016 Cadillac ATS-V Sedan has been spotted testing on the Nürburgring and doing some air time in the process.

A prototype of the 2016 Cadillac ATS-V Sedan has been spotted testing on the Nürburgring and doing some air time in the process.

We haven't seen an American car being that much tested around the Nürburgring but Cadillac is focused to make the 2016MY ATS-V Sedan a true rival for the new BMW M3 F80 and the upcoming C63 AMG. The camouflaged prototype seen here was being pushed quite hard around the Nordschleife and a couple of times you can see the wheels are all up in the air.

Sporting a more aggressive body, the ATS-V will carry a brand new front grille that appears to be quite large and boasts many vertical slats. There's also a power bulge, beefier air vents and a stiffer sports suspension matched with larger alloys. At the back we notice a prominent spoiler together with a quad-pipe exhaust system.

We don't know the identity of the engine but there are two main suspects: a 425 bhp twin-turbo V6 3.6-liter and a newly developed 500 bhp twin-turbo V6 3.2-liter. Some say there will also be a V8 version with more than 500 bhp for an ATS-V Plus model while gearbox choices for the entire ATS-V Sedan and Coupe range will include a standard seven-speed manual and an optional eight-speed auto.

Expect a public debut in January 2015 at NAIAS in Detroit, with sales to kick off several months later.

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