Diesel Avant-Garde

To be honest, I myself used to dislike diesels. For the time being. While advances in the construction of diesel power plants suddenly is not really gone in leaps and bounds, while the petrol engines, it seemed almost exhausted. And the most striking example was a victory for racing prototypes with four rings on the "nose" and the inscriptions on the sides of TDI in the legendary marathon "24 Hours of Le Mans' racing series and the ALMS. Personal acquaintance with the same first 2 and 3 liter turbodiesel nedyuzhenny instilled optimism in me until now "gasoline" soul. And then V8. As many as 4.2 liters volume! To date, this unit - the most powerful of diesels for the production of passenger cars. He has 326 hp maximum power and a truly devastating avalanche of torque - 760 Nm! To achieve such performance, one of only impressive enough. Engine Audi are very high technology. Turbine with variable geometry (one for each row of cylinders) are able to "naddut" up to 2.5 bar overpressure. The engine control unit continuously provides them with the same speed (up to 226 000 r / min) and, consequently, performance. For each a separate intercooler. The cylinder block is cast from an alloy of iron and graphite, which resulted in its high strength with low weight of 62 kg. Yes, and the total weight of the engine was only 255 kg - it is lighter than its predecessor, 4 liter per 15 kg! Significantly reduce the vibration allowed a special form of chromium-molybdenum crank, and with new valves with hydraulic lifters and camshaft drive chain bezlyuftovomu able to increase smoothness and reduce noise. The inner surface of the cylinder is processed by ultraviolet laser, which reduces oil consumption. Working mixture is preparing Common Rail system with the latest generation of piezo injectors. What do all these techno-tricks in practice? And the fact that motor 4,2 TDI - the most perfect of all modern turbo diesel. With its outstanding performance cardinality, it is surprisingly economical - the average consumption during the test was about 16 liters per 100 kilometers. Notice is not high-octane gasoline. And it's the quiet one. Outside, the sound of his work is barely audible. Moreover, it is tonally very similar to the sound of gasoline engine, the same FSI, for example - no "tarahteniya." Inside, behind thick layers of sound insulation, luxurious leather and wood interior luxury, it is not audible at all. Vibration on controls is not in sight. Only under intense acceleration in the cabin gets a muffled roar, "Eight." And this swift acceleration. It was no joke - 6.4 seconds up to "hundreds"! Faster petrol version with the same engine volume is almost a second. Tiptronic fulfills its great, change the transfer time and almost imperceptibly. Besides, if you go quietly, then he does it extremely rarely - the sea of ??torque available even at idle. Incredible flexibility! But still, how do you want once again "drown" the gas pedal to the floor and enjoy this gentle but energetic leap forward! Feeling arises is, if someone went and moved the huge three-ton immediately SUV for a few hundred meters! After reaching 100 km / h this pressure does not subside. Monstrous silischa continues intensively to disperse Q7. It was only after 160-170 km / h head weakened slightly, but still, and "two hundred" the car gathers in one breath. Importantly, at these speeds Audi feels totally at ease. Air suspension is stiffer and presses the "body" to the ground, the car is easily reconstructed from the series in a row, leaving behind many competitors, it would seem better suited for such exercises. Inside, at the same time - peace and quiet. High class! This space-eater! Introduction to the Audi Q7 4.2 TDI made me think seriously about the future prospects of the gasoline engine. Unless there is a technological revolution in this field, it soon will be far ahead of the turbo diesel in all respects - power, flexibility, efficiency, environmental friendliness. Accustomed to save and protect the environment Europeans can understand - in Europe, diesel fuel much cheaper than gasoline and its combustion products are harmless. As for us, "diesel fuel" is not much smaller than "ninety-fifth," besides, she is not always high quality. But things are changing. Fortunately, the better (except the price, though). Of course, "our" potential owner Q7 will opt for a diesel is not for reasons of economy. Once again, we are choosing our own, different from anyone else through. Seems to have become fashionable just to ride a diesel engine. But be that as it may, it is worth it. More than.