This is one of the first reviews of the new high-performance Mercedes CLA45 AMG. This test is conducted in public streets. We guess we'll have to wait a bit longer to see the new Mercedes CLA45 in action on the race track. The CLA45 AMG comes with a 2.0-liter 4-cylinder turbo engine that's good for 360 hp and 450 Nm of torque. With this engine, the CLA45 is able to get from nought to 62 mph (100 km/h) in just 4.6 seconds. Its top speed is electronically limited to 155 mph (250 km/h).