How many “horses” are in a tax-efficient motor? Test stand
How do official specifications differ from real ones? We have already tested cars from the frontier tax-profitable category up to 250 hp for craftiness. The results turned out to be different: someone honestly gave out the declared power, and someone did not hold out a little. But one thing is quite powerful cars, which in any case do not suffer from a deficit of traction, and quite another thing - folk.
So we checked the cars easier. Since the strength of these is less, the loss of each "horse" becomes very noticeable. The same goes for torque.
So, here is our test five. In the budget segment are Lada XRAY Cross and its rival relative Renault Logan Stepway. In the golf class, the third-generation Kia Ceed is gaining momentum. Attracted our attention and one of the leaders in the camp of crossovers - the updated Nissan X Trail.
The Chinese Haval H6 crossover is not the most popular on the Russian market among classmates, but rather fresh. About the real power of the "Chinese", especially with turbocharging, they talk in every garage. So check it out!
Runaway herd
We take measurements together with our good friends from the AGP Motorsport workshop - on the modern dynamometer Dynomax 5000 AWD with running drums, which is designed for any type of drive. Before driving cars to the drums, a few words about the test procedure.
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Now all manufacturers measure power on the flywheel of the engine with all the auxiliary equipment. Naturally, we cannot remove the motor from each car. It is clear that the bench power “from the wheels” during acceleration in direct gear from 1500–2000 rpm to maximum revolutions will be significantly less than the net power on the flywheel. Because transmission losses are inevitable. That is why any modern stand can recount the results, taking into account all losses.
Another coefficient automatically applied by the bench relates to test conditions. According to UNECE Regulation No. 85 and ISO 1585, the ambient temperature should be +25 ° C, atmospheric pressure - 99 kPa.
At the same time, the stand still gives an error that does not exceed 5%. As our experience shows, this error is always not in favor of the motorist. But if the obtained data fit into these percentages, we believe that the power and torque of the engine are indicated honestly.
To reinforce the results of the stand, we will take measurements of the dynamics, that is, the acceleration time from standstill to 100 km / h
NET AND GrossHow is engine power measured when compiling technical data for a new car? Once upon a time, manufacturers operated with gross power, or the so-called laboratory power, - removed from the engine without attachments. It is clear that in this case the indicators are higher, but these data have nothing to do with the real return “on wheels”. Therefore, such measurements were gradually abandoned in favor of the net power measured on the engine flywheel with all auxiliary equipment. |
Stand up
The first to enter the drums is the Lada XRAY Cross with a 1.8 liter VAZ 21179 engine. A series of set-offs gives the best result of 118 hp. with the declared 122 forces. Given the measurement error, we can assume that the VAZ engine honestly gives the declared power. But the torque did not reach the factory data, part of the Newton meters scattered in an unknown direction: 152 N · m against 170 N · m in the factory characteristics table.
Lada XRAY. Before measurements, we determine the loss in the transmission - otherwise, accurate data cannot be obtained. To do this, we carry out a single roll-out of the car in direct (or close to direct) transmission. Lada XRAY. Before measurements, we determine the loss in the transmission - otherwise, accurate data cannot be obtained. To do this, we carry out a single roll-out of the car in direct (or close to direct) transmission.
We decided to confirm the results of measurements at the dynamometer stand with measurements of acceleration dynamics up to 100 km / h using the VBOX Racelogic measuring system. We decided to confirm the results of measurements at the dynamometer stand with measurements of acceleration dynamics up to 100 km / h using the VBOX Racelogic measuring system.
Measurement of dynamics confirmed the old rule: the car accelerates not power, but torque. Those cars that didn’t have enough time at the stand were worse than others in acceleration to 100 km / h. Measurement of dynamics confirmed the old rule: the car accelerates not power, but torque. Those cars that didn’t have enough time at the stand were worse than others in acceleration to 100 km / h.
Following are three foreign cars of the Russian assembly: Renault Logan Stepway with 113 horsepower 1.6 engine, followed by a Kia Ceed hatchback with an engine of the same volume, but with a capacity of 128 hp. and all-wheel drive Nissan X Trail with a 2.5 liter engine of 171 hp The results of the measurements turned out to be like a carbon copy - everyone was short of five or six “horses” each. But the situation is different with the torque: Renault and Kia produced results close to the official data, while the Nissan X Trail “Newtons” were missing.
Renault Logan. No matter how we tried, the Logan engine did not give out 113 hp. Although the torque almost repeated the factory data. Interestingly, most of it is available after 2000 rpm. True, at medium speeds there is a small failure, which is felt during acceleration. Renault Logan. No matter how we tried, the Logan engine did not give out 113 hp. Although the torque almost repeated the factory data. Interestingly, most of it is available after 2000 rpm. True, at medium speeds there is a small failure, which is felt during acceleration.
Kia Ceed. The graphs of Sid's moment and power are confirmed by subjective sensations - the elasticity is not bad, and the pickup at high speeds is reflected in the external speed characteristic. After 5000 rpm there is a surge in power and torque. Kia Ceed. The graphs of Sid's moment and power are confirmed by subjective sensations - the elasticity is not bad, and the pickup at high speeds is reflected in the external speed characteristic. After 5000 rpm there is a surge in power and torque.
Nissan X Trail. The most powerful in the test five, the X Trail, was the worst-hit in the torque. Moreover, its peak was reached at 2500 rpm, and then the characteristic went down, and even with periodic failures. This affected the dynamics - in a sprint up to 100 km / h, the crossover yielded to the indicator declared by the plant for more than a second. Nissan X Trail. The most powerful in the test five, the X Trail, was the worst-hit in the torque. Moreover, its peak was reached at 2500 rpm, and then the characteristic went down, and even with periodic failures. This affected the dynamics - in a sprint up to 100 km / h, the crossover yielded to the indicator declared by the plant for more than a second.
For dessert - Haval. To the whistle of the Chinese turbine H6 spins the drums and … Skeptics are put to shame! The power is very close to the declared, as well as the moment: 206 N ∙ m against 210 N ∙ m in the "passport". It turns out that the one we most doubted was the most honest of all.
Haval H6. At the power stand, I was surprised by the Chinese Haval H6, the honesty of which we doubted the most. If you believe the passport data, the "shelf" of maximum torque stretches from 2500 to 4000 rpm. In fact, this is not entirely true: the moment does not have a pronounced “shelf” and reaches a peak at a fairly high 4000 rpm. Haval H6. At the power stand, I was surprised by the Chinese Haval H6, the honesty of which we doubted the most. If you believe the passport data, the "shelf" of maximum torque stretches from 2500 to 4000 rpm. In fact, this is not entirely true: the moment does not have a pronounced “shelf” and reaches a peak at a fairly high 4000 rpm.
Importance of the moment
How do laboratory-drum results compare with reality? Does the car really accelerate not power, namely torque? The dynamic measurement algorithm is standard: all "extra" consumers that negatively affect acceleration (primarily an air conditioning compressor) are disabled. The windows are closed. The road should be perfectly flat to the horizon and straight. Weight - Curb. However, when measuring factory workers, as a rule, use cars in the minimum configurations: the less additional equipment, the easier the car. We are “content” with test instances, which are usually stuffed with options, and therefore harder.
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Alas, there is nothing to compare the result of the "Chinese" with. There is simply no factory data on the maximum speed of the H6 and its dynamics. We accelerated the crossover to 100 km / h in 12.5 seconds. Taking into account the power output and one and a half tons of curb weight, this is the expected average statistical result.
Although Lada was closer than the others to the declared power, it was far from the factory 10.9 seconds. The VBOX Racelogic measuring system recorded 12.67 seconds of acceleration from standstill to 100 km / h. This is the biggest discrepancy with the declared data in today's company.
Optimists also work in Renault: we could not get “paper” 12 seconds to hundreds, no matter how hard we tried. In reality, Logan Stepway loses promises and a half seconds: its result is 13.48. The difference is less than that of Lada, as well as a shortage of torque.
More than a second compared to the "factory" went through Nissan.
Kia Ceed is most accurate of all: 12 real seconds against eleven and a half in the factory data.
Comparison of measurement results with passport data
Maximum power |
Torque |
|||
factory data |
measurements at the stand |
factory data |
measurements at the stand |
|
HAVAL H6 |
143 h.p. (105 kW) at 5600 rpm |
133 h.p. (98 kW) at 5500 rpm |
210 Nm at 2500–4500 rpm |
207 Nm at 3900 rpm |
KIA CEED |
127.5 h.p. (93.8 kW) at 6300 rpm |
116 h.p. (85 kW) at 6450 rpm |
154.6 Nm at 4850 rpm |
142.5 Nm at 5400 rpm |
NISSAN X-TRAIL |
171 h.p. (126 kW) at 6000 rpm |
157.3 h.p. (109.4 kW) at 6525 rpm |
233 Nm at 4000 rpm |
194.4 Nm at 2550 rpm |
RENAULT LOGAN STEPWAY |
113 h.p. (83 kW) at 5500 rpm |
101.5 h.p. (75 kW) at 5611 rpm |
152 Nm at 4000 rpm |
145.8 Nm at 4100 rpm |
LADA XRAY CROSS |
122 h.p. (90 kW) at 6050 rpm |
117.5 h.p. (86 kW) at 5750 rpm |
170 Nm at 3700 rpm |
152 Nm at 5150 rpm |
* * *
The bottom line: nobody declared the horsepower stated in our test. It turns out that we overpay the state for a capacity tax that is not there! But this does not mean that you will have to pay with dynamics, because in the first place, the car accelerates not power, but torque. With him, in our current five things are a little better.
The most interesting results were given by Lada and Kia. The first one confirmed the nameplate capacity, but the lack of torque affected acceleration more than others. At Kia, the opposite is true - a shortage of power, but thanks to an honest torque, Ceed got the closest to the declared dynamic parameters.
MANUFACTURER DATA
HAVAL H6 |
KIA CEED |
NISSAN X-TRAIL |
RENAULT LOGAN STEPWAY |
LADA XRAY CROSS |
|
Curb / Gross Weight |
1650/2240 kg | 1364/1800 kg | 1623/2070 kg | 1154/1611 kg | 1300/1650 kg |
Acceleration 0-100 km / h |
n.d. | 11.5 c | 10.5 s | 12.1 s | 10.9 s |
Top speed |
184 km / h | 192 km / h | 190 km / h | 170 km / h | 180 km / h |
ENGINE | |||||
Type of |
petrol | petrol | petrol | petrol | petrol |
Location |
front, transversely | front, transversely | front, transversely | front, transversely | front, transversely |
Configuration / Number of Valves |
P4 / 16 | P4 / 16 | P4 / 16 | P4 / 16 | P4 / 16 |
Working volume |
1497 cm³ | 1591 cm³ | 2488 cm³ | 1598 cm³ | 1774 cm³ |
Power |
105 kW / 143 HP at 5600 rpm |
93.8 kW / 127.5 HP at 6300 rpm |
126 kW / 171 HP at 6000 rpm |
83 kW / 113 HP at 5500 rpm |
90 kW / 122 h.p. at 6050 rpm |
Torque |
210 Nm at 2200–4500 rpm |
154.6 Nm at 4850 rpm |
233 Nm at 4000 rpm |
152 Nm at 4000 rpm |
170 Nm at 3900 rpm |
TRANSMISSION | |||||
type of drive |
front | front | full | front | front |
Transmission |
A6 | A6 | CVT | CVT | M5 |
The editors thank AGP Motorsport for their help in preparing the material.
Counting “horses”: folk cars at a power stand