High tech under the short hood

New 1.9-liter engine for the A-Class

• 4-cylinder engine with high elasticity and low fuel consumption
• Combination of modern lightweight construction and intelligent engine management
• 5-speed sports gearing as standard for the A 190
• Engine range now including three gasoline and two CDI engines

With the newly developed 1.9-liter engine, the A-Class emphasizes its sporty and dynamic character with particularly impressive flair. This powerful 4-cylinder unit, with 92 kW/125 hp, is characterized by its excellent pull, which ensures both relaxed and agile driving especially in fourth and fifth gears. With a maximum torque of 180 Newton-meters available from 4000 rpm, the engine is ideal for low-revving highly economical driving styles whilst at the same time providing ample reserves of power for the kind of sudden sprints that may be required when overtaking on expressways and highways. Expressed in figures, the A 190 takes only 13.3 seconds to accelerate from 60 to 120 km/h, making it about five seconds faster than the A 160 with the 75 kW/102 hp engine.

The other performance features of the new top-of-the-line A-Class speak the same dynamic language: the A 190 needs only 8.8 seconds to sprint from 0 to 100 km/h and reaches a top speed of 198 km/h. The table below gives the essential data of the 1.9-liter engine:

The new A 190 is standard-fitted with disk brakes at front and rear and has 16" alloy wheels: the wheel format is 5.5 J x 16 and the tires are of size 195/50 R 16.

The fuel consumption figures of the new top-of-the-line A-Class are as exemplary as its performance: in the European NEDC cycle, the 1.9-liter is content with only 7.7 liters of premium gasoline per 100 km, so that a full tank of 54 liters will be enough for about 700  kilometers.

* In l/100 km conforming to 93/116/EC

A particularly positive role in these low fuel consumption figures is played by the modern lightweight engine construction of the engine, with its numerous aluminum components (crankcase, cylinder head, oil pan, oil pump and cam followers), the low-friction cylinder linings made of a new aluminum-silicon alloy and the selective fuel injection system with hot film mass air flow meter.

Another decisive contribution to the reduced fuel consumption is made by the special swirl channels in the cylinder head: these channels create rapid turbulence movements in the fuel-air mix, thereby optimizing the combustion process. Mercedes engineers have improved the thermal efficiency of the engine by establishing the high compression ratio of 10.8 : 1