2020 Mercedes-AMG CLA 45 debuts with the world’s most powerful four-cylinder.
The engine produces over 380 horsepower and sprints to 60 mph in just four seconds. 
Expect the new Mercedes-AMG CLA 45 later this year, with pricing due close to that time. 

The 2020 Mercedes-AMG CLA 45 is finally here. It?s essentially a compact sport-luxury car with the power and torque output of a muscle car. It carries the same design language as the larger CLS but is no bigger than a C-Class. In short, it?s a small little monster packing a mean punch. Over the next few minutes, we will take a look at the new Mercedes-AMG CLA 45.
And it’s only fitting we start with the engine.
Mercedes-AMG M139 Engine
The outgoing Mercedes-AMG CLA 45 is by no means a slow car. It came with the M133 engine producing 375 horsepower. However, if there?s one thing not so good with the old engine, it’s that it has a tendency to dump all its torque at lower engine speeds. Enter the new M139 engine. For starters, it?s the most powerful production four-cylinder in the world. In the 2020 Mercedes-AMG CLA 45, the motor is good for 382 horsepower and 354 lb-ft. of torque, a reasonable jump from the previous output. Quite honestly, that?s a lot of oomph from a humble 2.0-liter four-cylinder. Mercedes-AMG claims a zero to 60 time of only four seconds while top speed is electronically-limited to 155 mph. The optional AMG Driver?s Package increases that to 168 mph (so order that). More importantly, t...