Fisker, the startup company behind the Karma hybrid luxury sedan and the upcoming Nina electric car, has been forced to stop work on its new plant because of failure to meet milestones required by the Department of Energy in its loan contract.

The 2013 Cadillac ATS continues to impress with a new video detailing its performance sound--but whether it will be able to keep pace with the likes of Audi, Mercedes, BMW, and Lexus will have to wait until we get our hands on one.

Audi's next-generation $8 will keep its normally-aspirated V-8 and V-10 engines despite the supercar trend of going turbo.

Catch all of these stories and more in the day's news headlines below.

2013 Cadillac ATS Tuned For 'Performance Sound': Video

AMG Boss Uninterested In High-Performance Diesels

Chrysler's Ad About Detroit Comeback Filmed In... New Orleans?

Fisker Lays Off Workers, Seeks New Government-Loan Terms

Next Audi R8 To Keep Normally-Aspirated V-8 And V-10 Engines

Bugatti Veyron Doing 220-Plus MPH Runs On Public Road: Video

Nissan Invitation Concept Is Toyota Yaris, Ford Fiesta Competitor

Volkswagen GTI Convertible Set For Geneva Motor Show: Report

Cadillac's ATS Coupe On Hold, Or Is It?

Adrian Newey On The Record: F1 Design, 2012 Season