2013 R231 Mercedes SL63 AMG spotted testing
The new M157 twin turbo V8 powered SL63 AMG was spotting doing its final testing before its official reveal expected in Geneva. The rear exhaust setup closely follows the renderings BenzBoost did last month
. Mirroring the other M157 twin turbo cars expect standard figures of around 518 horsepower and a performance package option with 550 horsepower. With less weight and more power than the previous SL63 AMG the new model should not give up much if anything to even the previous range topping SL65 AMG.