Engine power is a key parameter that affects acceleration dynamics, maximum speed and even the cost of insurance. But how can you check it if there is an error in the documents, and the seller is in no hurry to disclose the real numbers? In this article we will analyze 7 ways — from official data to independent measurements, including little-known nuances for diesel and turbocharged motors.

You will learn where to look for information in PTS or STS, how to decipher the VIN code, which online services provide accurate data (and which do not), and why the figures in hp. and kW may differ by 10-15%. We will pay special attention torque calculation method — it works even for tuned cars, where standard data is not available.

1. Checking power using documents: PTS, STS and registration certificate

The most reliable way is to study primary documents per car. B PTS (vehicle passport) power is indicated in paragraph 9 (for domestic cars) or in the column "Engine power" (for imported ones). Please note: there may be two meanings - in kilowatts (kW) and horsepower (hp).

The translation formula is simple:

  • 🔢 1 kW = 1.3596 hp (exact coefficient)
  • 📊 Example: if the PTS indicates 103 kW, then in hp this is 103 × 1.3596 ≈ 140 hp
  • ⚠️ Attention: in STS (certificate of registration) sometimes indicate rounded meanings - for example, 138 hp instead of 140 hp. This is not a bug, but a design feature.

If documents are lost or you doubt their authenticity, check the data via official website of the traffic police. Enter the VIN or license plate number - the system will show the power from the registration database. But keep in mind: there may be data at the time of last re-registration, and not relevant after tuning.

📊 How often do you check the power of a car before buying?
Always
Only if in doubt
Never checked
I trust the seller

2. Decoding the VIN code: where is the power hidden?

The VIN (vehicle identification number) contains information about the engine model, and therefore its power. You can decipher it three ways:

  1. Online decoders (for example, Vinformers or VinDecoderz). Enter the 17 characters VIN - the system will show technical characteristics, including power. Accuracy: 85-95% for European and Japanese cars, 60-70% - for Chinese.
  2. Manufacturer tables. For example, for Volkswagen power is encoded in 6-9 characters VIN (engine model). Using this code you can find data in directories ETKA or ElsaWin.
  3. Mobile applications like VIN Scanner (Android) or CarVIN (iOS). They download data from manufacturers' servers, but may provide outdated information for cars older than 2010.

⚠️ Attention: In VIN code The exact power is not always indicated - engine model only. For example, motor BMW N57 released in versions from 190 hp up to 381 hp. To clarify, we need information about the ECU (electronic control unit) firmware.

How to find the VIN code on a car?

The VIN is usually located in the following locations:

  • 🚗 On a sign under the hood (on the body or engine shield).
  • 🔑 On the driver's side dashboard (visible through the windshield).
  • 📄 In the documents: PTS (line "VIN"), STS (field "Identification number").
  • 🔧 On the frame or side members (for SUVs and commercial vehicles).

On some models (for example, Mercedes-Benz) VIN is duplicated on a sticker in the doorway.

3. Online services for testing power: which ones work in 2026?

If there are no documents and the VIN code does not give a clear answer, use specialized services. We tested 10 platforms and selected 3 most accurate:

Service Accuracy Pros Cons
Kolesa.ru 92% Database of 50+ brands, including UAZ and GAZ No data on cars older than 2000
Autocode 88% Shows the history of power changes (for example, after chip tuning) Paid report (from 349 ₽)
Vinformers 85% Free VIN decoding, data on Hyundai and Kia more accurate than competitors No information on electric vehicles

🔍 Advice: If the services provide different data, check with catalog Drom.ru. There the power is indicated for each modification. For example, Skoda Octavia 1.8 TSI 2018 was released in versions 180 hp and 192 hp - depends on the firmware.

View the power in 2-3 services|Check with the data in the PTS|Check with the seller whether chip tuning has been done|Check the history via Autocode (for accidents and flashing)

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4. Self-calculation of power based on torque

If you know torque (Nm) and maximum speed (rpm) of the engine, power can be calculated using the formula:

Power (hp) = (Torque × RPM) / 7021

Example for Ford Focus 1.6 Ti-VCT:

  • Torque: 150 Nm (with 4000 rpm)
  • Maximum speed: 6300 rpm
  • Power: (150 × 6300) / 7021 ≈ 135 hp

⚠️ Attention: This method gives theoretical power, which may differ from the real one by 5-10% due to:

  • 🔧 Loss in transmission (especially in all-wheel drive cars).
  • 🌡️ Air temperatures (at each 10°C above normal power drops by 1%).
  • ⚡ Fuel quality (at AI-92 the motor loses up to 5 hp compared to AI-98).
💡

To find out the torque, look at the technical documentation or use an OBD2 scanner (for example, ELM327). Connect it to the diagnostic connector and read the data through the application Torque Pro (Android).

5. Measuring power on a dyno

The only way to find out real power taking into account all losses - test on a dynamometer. This is relevant for:

  • 🔧 Car after tuning (chip tuning, turbine installation).
  • 🚗 Used cars with unknown history.
  • 🏁 Sports cars where accuracy is important (for example, for racing).

Cost of measurement in Russia:

Stand type Price (₽) Accuracy
Inertial (most common) 1500–2500 ±3%
Brake (for racing cars) 3000–5000 ±1%
Mobile (travelling) 2000–4000 ±5%

📍 Where to take measurements:

  • 🔧 Service station with a dynamometer (search for "power meter [your city]").
  • 🏁 Autodromes (for example, Moscow Raceway or Kazan Ring).
  • 🚗 Clubs of tuning cars (often organize group measurements at a discount).
💡

After chip tuning, the power on the dynamometer may be LOWER than declared due to incorrect ECU firmware. Always check the torque graphs - if the peak is shifted to the high rpm zone (5000+), the engine will be “dull” in the city.

6. Determination of power by engine model

If you know exact name of the motor (for example, Toyota 2GR-FE or Renault K4M), power can be found in the technical documentation. Where to look:

  1. Official websites of manufacturers (section "Specifications"). For example, for BMW — bmw.ru.
  2. Spare parts catalogs (Exist.ru, Emmegi.ru). Enter the engine model - the system will show all modifications indicating the power.
  3. Owner forums. On Drom.ru or Drive2.ru They often post scans of manuals.

🔍 Example: Engine VW EA888 installed on Audi A4, Skoda Superb and Volkswagen Passat with power from 150 hp up to 300 hp. To clarify, we need information about:

  • 📅 Year of manufacture (engines before 2015 are weaker by 10-20 hp).
  • 🔧 Type of supercharger (turbine or compressor).
  • ⚡ ECU firmware (for example, Stage 1 adds +30 hp).

7. Power of electric vehicles: testing features

For electric cars, power is indicated differently than for internal combustion engines. It is important to distinguish here:

  • 🔋 Peak power (maximum, but short-term, for example, 476 hp at Tesla Model 3 Performance).
  • ⚡ Rated power (constant, usually at 20-30% below peak).

Where to look for data:

  1. PTS - in the column "Motor power" (indicated in kW).
  2. Charger - on some models (for example, Nissan Leaf) the power is duplicated on the sticker next to the connector.
  3. Mobile application (for example, Tesla App or MyBMW) - shows the real power taking into account the battery charge.

⚠️ Attention: Electric vehicle power falls in winter on 15-25% due to:

  • ☃️ Battery heating (energy is wasted).
  • ❄️ Deterioration of traction (wheel slippage reduces efficiency).
  • 🔋 Battery degradation (after 5 years the capacity drops by 10-15%, and with it power).

FAQ: Frequently asked questions about car power

Is it possible to increase engine power without tuning?

Yes, but not significantly (3-7%). Methods:

  • 🛢️ Use fuel with octane rating 98+ (for turbo engines).
  • 🌡️ Install cold air intake (lowers intake air temperature).
  • 🔧 Replace the air filter with nulevik (adds 2-5 hp).

⚠️ Risk: incorrect modifications can reduce engine life.

Why is the power indicated in the PTS in kW and not in hp?

Since 2010 in Russia the capacity in PTS indicated in kilowatts (kW) according to Technical regulations of the Customs Union. This is an international standard (ISO 3779). To convert to HP, multiply by 1,3596.

How to check whether the power in the documents is “rolled back”?

Signs of a fake:

  • 📄 The power is indicated in the PTS rounded (for example, 150 hp instead of 148.6 hp).
  • 🔍 Data in PTS and STS don't match.
  • 🚗 Power on the dynamometer 15%+ lowerthan in the documents.

To avoid being scammed, check the VIN code with the database traffic police.

Does power affect the cost of compulsory motor insurance?

Yes, but not directly. Insurance companies take into account:

  • 📊 Power factor (KM) - the higher the hp, the more expensive the policy.
  • 🚗 Engine type: for turbocharged and diesel motors are taken to 10-20% more.

Example: for car 100-120 hp KM = 1.1; for 150-180 hp - already 1.4.

What power is considered optimal for the city?

Depends on vehicle weight and transmission type:

Car type Optimal power (hp) Model example
Small car (up to 1200 kg) 70–90 Hyundai i10, Kia Picanto
Sedan/hatchback (1200–1500 kg) 100–130 Toyota Corolla, Skoda Octavia
Crossover (1500–2000 kg) 140–170 Mazda CX-5, Volkswagen Tiguan

🔍 For an automatic transmission (automatic transmission), the power should be at 10-15 hp higher than for manual transmission.