Petrol engines: up to 193 hp of output with turbocharging

Mercedes-Benz has improved the proven four-cylinder petrol engines for the A-Class in major respects, achieving remarkable progress in numerous aspects. Output has been increased by up to 38 percent compared to the preceding models, with torque improving by more than 36 percent, while the fuel consumption, exhaust emissions and noise are significantly reduced.

As before, there is a choice of four petrol engines. The increase in output and torque is mainly based on an approx. 100 cc larger displacement and the use of a variable intake manifold in models A 150, A 170 and A 200. This means that without complex four-valve technology, these engines have a volumetric efficiency of 47 to 50 Kilowatts per litre of swept volume, a remarkable achievement in this vehicle class, and develop a high torque even at low engine speeds. Take the A 200 as an example: this lively 100 kW/136 hp engine makes 156 Newton metres – 84 percent of its maximum torque – available at a mere 1500 rpm. The figures for the engine in the new A 200 TURBO are even more impressive. This 142 kW/193 hp unit achieves a ratio of approx. 70 Kilowatts per litre of displacement, and from 1800 rpm the driver can call upon a maximum torque of 280 Newton metres which remains constant throughout a wide engine speed range. This creates the ideal conditions for rapid acceleration and powerful intermediate sprints.

Key data of the petrol engines for the new A-Class at a glance: