Skoda Octavia Test
MEANS FOR GREED
Rising fuel prices have recently become as familiar as autumn rains or snow in winter. But because many, it would seem, should pay attention to diesel models. However, no surge in the popularity of diesel engines is not observed. Why?
Who is in harmony with the epoch?
Diesel cars are very popular in many countries. The reason is on the surface: better fuel economy and cheaper fuel. But not only. The latest generation of diesel engines is distinguished, in addition to its unique efficiency, by low noise level and excellent traction characteristics. That is the situation there. Alas, we do not have domestic diesel engines in “commodity quantities” yet, and the demand for imported ones is small. Firms that have diesel cars in a warehouse in Moscow (excluding all-terrain vehicles) can be counted on the fingers of one hand.
For the experiment, we found two Skoda-Octavia modifications: SLX 1.9TDI and SLX 1.8 20V. In their class, they are relatively inexpensive, and they are also known and popular in Russia. Octavius motors are close in displacement and power, they are distinguished by a high technical level.
WE COUNT THE “HORSES”
The Skoda petrol has a four-cylinder engine with a displacement of 1781 cmz under the hood. The unit is not simple: five valves per cylinder, variable valve timing, variable-length intake pipe - even awkward to mention distributed injection and a neutralizer. With such a complex design, the power is relatively small - 92 kW / 125 l. sec., but high torque in the entire rev range, excellent economic and environmental indicators. In general, an even high-torque engine, without dips and pickups, spins above 6000 rpm.
The Skoda diesel engine hides under the bonnet a very popular 1.9 TDI engine in Europe with a working volume of 1896 cm3 and a power of 81 kW / 110 l. with. Direct fuel injection (or rather, an undivided combustion chamber), a turbocharger with an adjustable turbine guide apparatus and intermediate air cooling provide it with high power and torque, combined with excellent economy.
A gasoline car is 30 kg lighter and 15 liters. with. more powerful, but the diesel "Octavia" has its own "ace in the sleeve" - the "extra" 65 N.m of torque. What is more important? Let's look at the dynamometer road.
WHO IS FASTER?
Both cars are equipped with a "package for bad roads", increasing ground clearance up to 170 mm. Of course, this affected the aerodynamics and, accordingly, at maximum speed. The petrol "Octavia" did not reach the declared figures of almost 12 km / h, diesel - only about 5 km / h, so the difference noticeable in technical characteristics actually turned out to be insignificant. The differences in the acceleration of cars are also small: up to 80 km / h almost "head to head" and only when the speedometer starts showing three-digit numbers, the Skoda gasoline regains about a second.
But elasticity (engine adaptability to load) leads diesel into the lead. Despite the excellent performance of the gasoline engine, the additional 65 N.m of torque on the turbodiesel creates a tangible advantage, especially in fifth gear.
As expected, the Skoda diesel, due to its larger mass and higher (recommended) tire pressure, showed a slightly better run-out and lost a bit during braking.
WHAT'S THE DIFFERENCE?
From dry numbers, it's time to move on to subjective sensations. After all, often the difference in devices is miserable more than distinct, and objective flaws are dissolved against the general background.
For a start - about noise and vibration. Although the designers of Volkswagen worked hard to fine-tune the diesel engine, the nature and noise level will make it possible to accurately determine the diesel standing next to the car. Inside, the difference is not so noticeable, but the characteristic vibration on the steering wheel, gear lever and pedals will also not make a mistake. However, all this is only at idle. In motion, the difference is barely perceptible.
Now about the comfort of the suspension. Adapted to our bad roads, the Octavia pretty hard work out the surface roughness. Diesel has a slightly better ride and requires less “steering” on rough roads at high speeds.
In the turns, both cars are doing well, but at the limit, the Skoda petrol behaves better and more unequivocally, unconditionally obeying the driver and immediately completing when discharging gas. The diesel engine reacts with a noticeable delay and is more prone to demolition of the front axle.
ONE GATE PLAY
That is what the attempt of even the best gasoline engine to compete with a diesel engine in economy looks like. The defeat of the first is predetermined, the only question is - with what score?
First, I had to compose my own “urban” and “suburban” cycles, taking as a basis the Euro III well-known to professionals and slightly adapting it to domestic conditions. Unfortunately, standard techniques have little to do with real movement. Detailed cycle diagrams are shown in the figures. They may seem too harsh to many, but the results have convinced us that we have chosen their conditions correctly. For greater accuracy, all measurements were carried out three times. In addition to the “official” cycles, we measured the consumption at a constant speed in top gear in the range from 60 to 150 km / h and the average consumption in the process of measuring the dynamics of cars (as an example of an extremely uneconomical driving style). The results are more than indicative: in all modes, the diesel car spent at least 1.5 km per 100 km, and in some places almost 4 liters less fuel. In percentage terms, the gap is no less spectacular: the diesel "Octavia" is 22 - 46 (!)% More economical than gasoline.
ECONOMY SHOULD BE …
So, is it profitable to buy a new diesel Skoda Octavia? Let's try to count. According to our measurements, the average operational fuel consumption of gasoline Skoda will be 9.3 l / 100 km, and diesel - 6.8 l / 100 km. The price of AI-95 diesel fuel and gasoline at the time of the test was 4.4 and 7.5 rubles, respectively. per liter. For 100 thousand km, the savings will be 39, 830 rubles. or $ 1, 545 - alas, noticeably less than the difference in the price of cars (61, 440 rubles or 2, 400 dollars). However, with greater mileage or a further increase in fuel prices, the situation may change. If not one but. Mileage far beyond 100 thousand km clearly hints that serious repairs are possible. No, we are not talking about the chassis, here the differences are minimal, and not about overhauling the engine - it's too early for him. We are about fuel equipment - fuel injection pump and diesel nozzles, fuel pump and gasoline engine nozzles. Let's compare the prices (see table). The result does not need comments. So fuel economy is a lot of a lottery.
In driving performance, the Skoda Octavia with a diesel engine is practically not inferior, and in many cases even superior to the gasoline modification. If we talk about fuel consumption, then its advantage is undeniable. The difference in the comfort of the cars is minimal, and in terms of driving pleasure the diesel Octavia is even better. Losing a bit in handling at the limit, under normal conditions, this car is nicer to drive, and the impressive diesel torque gives powerful acceleration in the first movement of the right leg. And you do not need to switch again. For the convenience of traction control, the diesel Skoda is a cut above the gasoline, and our sympathies are entirely on its side.
But arithmetic has no sympathies, and ruthless figures convincingly prove the most: the time of a passenger diesel engine has not yet arrived in Russia.
The editors thank the company
"Pelican" for the provided
DEPENDENCE OF FUEL CONSUMPTION FROM SPEED UNDER UNIFORM FLOW