What is it? The all-new BMW 335is models are the sportiest iterations of the reskinned 2011 3-series coupe and convertible. These high-content versions of the highly successful 335i models are powered by a more muscular version of BMW’s award-winning twin-turbocharged, 3.0-liter inline-six. The reworked N54 engine develops 320 hp at 5,900 rpm and 332 lb-ft of torque from 1,500 rpm to 5,000 rpm, with an overboost mode that hikes twisting force to 370 lb-ft for up to seven seconds at full tilt....