Aston Martin Vantage RS Roadster Targets Porsche 911 GT3

Aston Martin's Vantage RS Roadster, spotted testing, targets the Porsche 911 GT3 S/C. It shares the coupe's aggressive aero, including a massive rear wing, and adds weight. Power could approach 700 hp from the AMG-sourced 4.0-liter twin-turbo V8.