Are the high and low power versions of the Mercedes-Benz M274 engine the same?
2 Answers
The high and low power versions of the Mercedes-Benz M274 engine are not the same. Introduction to the M274 engine: The M274 engine is based on the MRA (longitudinal) modular platform, with an actual displacement of 1991mL (2.0L). Depending on the tuning, it can be divided into low and high power versions, with maximum power outputs of 184PS and 211PS, and peak torques of 300Nm and 350Nm, respectively. The 2.0L high-power version of the M274 engine shares nearly identical power parameters with the M270's 2.0L turbocharged engine. As the high-power version of the M274 series 2.0T engine, it is the first major product from Mercedes-Benz's domestic engine factory in China. This engine utilizes direct fuel injection technology to ensure lower fuel consumption and more precise ignition. Compared to previous engines, this domestically produced engine has seen further improvements in parameters such as noise, vibration, and smoothness. The domestic version of the Q50L model uses a 2.0-liter turbocharged engine with a maximum power of 155kW and a maximum torque of 350Nm. The engine reaches its maximum power at 5500 rpm and its maximum torque between 1500 and 3500 rpm. The M274 engine is used in: Mercedes-Benz C-Class, Mercedes-Benz E-Class, Mercedes-Benz GLC, Mercedes-Benz GLK260, Infiniti Q50L.
I've studied the Mercedes-Benz M274 engine, and the high and low power versions are basically the same in terms of fundamental hardware, sharing the same block, pistons, and design architecture. However, the tuning differs significantly. The high-power version boosts output through a more robust turbocharger and ECU programming, delivering around 211 horsepower, while the low-power version offers about 180 horsepower. This results in differences in acceleration and peak torque. Many car enthusiasts find the high-power version more thrilling to drive, especially with its quicker response during overtaking, though it may lead to slightly higher fuel consumption. I also noticed that from a parts perspective, they share most components, so maintenance costs are similar—for example, the cost of replacing spark plugs is the same. However, when it comes to modifications, a simple ECU tune can enhance performance, but caution is needed to avoid overloading and damaging the engine. Overall, while the hardware is similar, the software and a few key components are the main differentiators.
