So, the tuning firm developed the M133 -- a 2.0-liter turbocharged unit gracing the A45 and CLA 45 AMG rockets. With 355 hp, ...

Not much separates 2-liter performance engines at the top of their game, but the M133 turbo unit still manages to pull ahead of the competition with an output of 360 PS (HP in metric system ...

25 Jun 2014, 14:41 UTC · By: Alex Oagana / Unveiled last year in the bonkers Mercedes-Benz A 45 AMG but finding itself in the CLA 45 AMG and the GLA 45 AMG as well since, the M133 engine is ...

It's 416, or 40 more than stumped up by the M133 engine it replaces. That means the M139 supplants the M133 as the world's most powerful series-produced four-banger. The 416-hp, 369-lb-ft version ...