Powering the Mercedes-Benz A45 AMG and the CLA45 AMG is the winner of the 1.8-liter to 2-liter category. The 2.0-liter turbocharged four-cylinder engine is the most powerful production four-cylinder engine with 355 hp and 332 lb-ft of torque. Even with all that performance, the powerplant achieves impressive fuel economy figures with the CLA45 AMG getting up to 26 mpg in the city and 38 mpg on the highway.
