The BMW 335is is powered by BMW's widely-acclaimed "N54" twin-turbocharged inline-6, which displaces 3.0-liters and features all-aluminum construction. The engine further benefits from BMW's High Precision direct fuel injection, Double-VANOS stepless valve timing, and advanced Digital Motor Electronics (DME) engine control system. For the BMW 335is Coupe and Convertible, the engine has a heavy-duty cooling system and has received special software that allows the N54 to sustain a nominal output of 320 horsepower and 332 lb-ft of torque.