Car torque - simply about complex things: what is it, how does it work and why is it more important than horsepower?

Have you ever wondered why one car easily pulls a trailer on a hill, while another, with a more powerful engine, literally “chokes” on the same road? Or why are diesel engines so beloved by truckers, despite the modest numbers in “horses”? The answer lies in one of the most important, but often underestimated characteristics of the engine - torque.

This term can be heard from mechanics, read in technical specifications, or encountered in controversial discussions on forums (“power vs torque”). But what does it really mean? Why do some manufacturers, e.g. Volkswagen or BMW, focus on torque in their turbo engines, while others don’t? And most importantly: how does this characteristic affect your daily driving experience?

In this article we will look at torque without complex formulas and engineering terms - so that even a beginner will understand why this quantity is often more important than horsepower. You'll learn how torque relates to acceleration, towing, efficiency, and even ride comfort. And also - how to correctly compare cars according to this parameter and what to look for when choosing a car.

What is torque in simple words?

Imagine that you are trying to unscrew a rusty nut with a wrench. If you just press on the key, nothing will work - you need to apply effort and crank him. This combination of force and rotation is the analogue of torque in everyday life. The same principle applies to a car engine: the pistons push on the crankshaft, causing it to rotate, and the torque shows how efficiently this happens.

Formally torque - this is the product of the force (with which the piston presses) and the length of the arm (the distance from the axis of the crankshaft to the point of application of the force). It is measured in newton meters (Nm) or, less often, in kgf m (kilogram-force-meter). For example, if in the characteristics Toyota Camry 2.5 moment indicated 243 Nm, this means that the engine is capable of cranking the crankshaft with a force of 243 Newtons per 1 meter long lever.

Key difference between torque and power: torque shows the ability of the engine to perform work “here and now”, and power is how much work he can do per unit of time. Simply put, torque determines how hard the engine is “pulling” at a given moment, and power determines how quickly it can accelerate the car to high speed.

Torque vs power: who wins?

This is an eternal debate among car enthusiasts: what is more important? horsepower or newton meters? The answer depends on how you operate the machine. Let's look at examples:

• 🚗 Power (hp) — determines the maximum speed and acceleration time to the “top”. The more power, the faster the car will overcome air resistance at high speeds. For example, Porsche 911 Turbo S with 650 hp will accelerate to 300 km/h, but for this it will need time and space.
• 🔧 Torque (Nm) — is responsible for the “responsiveness” of the engine in everyday situations: overtaking at low speeds, starting from a stop, climbing uphill. Diesel Mercedes-Benz OM617 (only 125 hp) with a torque of 280 Nm easily pulls a heavy SUV Gelandewagen without tearing.

In practice:

• 🏁 More important for racing cars and highways power — it allows you to develop high speeds.
• 🚛 Critical for trucks, SUVs and trailer towing moment — it provides traction at low speeds.
• 🚗 Important for city sedans and hatchbacks balance: sufficient torque for dynamic starts and power for overtaking.

Interesting fact: electric motors (for example, in Tesla Model S) produce maximum torque immediately from zero rpm, which is why electric cars start so quickly from a standstill, despite the modest “horsepower” power.

How does torque affect how a car behaves?

Let's look at real situations where timing plays a key role:

1. Starting off and accelerating. Cars with high torque at low speeds (for example, diesels or turbo engines) start smoother and faster. The driver does not need to “turn” the engine to high speeds - traction is available almost immediately. This is especially noticeable in traffic jams or on slippery surfaces.
2. Overtaking. To accelerate quickly to overtake, the engine needs to develop sufficient torque in the current rev range. If the torque “picks up” only after 3000 rpm, you will have to first reset the gear, which takes time.
3. Towing and transportation of goods. Trailers, heavy loads or a full cabin of passengers create additional stress. The torque at low and medium speeds is important here. For example, Ford F-150 with turbodiesel Power Stroke (470 Nm) pulls a trailer weighing 5 tons without tension, while a gasoline analogue of the same power will “suffocate.”
4. Driving uphill. When climbing, the engine has to overcome the force of gravity. High torque allows you to maintain speed without constant gear changes. This is especially true for mountain roads or busy highways.

Real life example: compare Volkswagen Golf 1.4 TSI (250 Nm) and Toyota Corolla 1.8 (170 Nm). With the same power (150 hp) Golf will feel more “alive” in the city thanks to the torque available from 1500 rpm, while Corolla will require spin-up to 4000 rpm for similar dynamics.

⚠️ Attention: If your car specs says it has high torque, but only delivers it at high revs (eg 5000 rpm), you won't feel the benefit in real-world driving. Pay attention to rpm range, at which the moment is maximum.

How is torque measured and where can I see its value?

Torque is measured on special stands - dynamometers. The process looks like this:

1. The engine is connected to a stand, which creates a load (brakes the crankshaft).
2. Sensors record the force required to overcome this load at different speeds.
3. The obtained data is plotted on a graph, where the revolutions are plotted along the X axis, and the torque in Nm is plotted along the Y axis.

Where to find timing information for your vehicle:

• 📄 Technical data sheet - usually indicated next to the power (for example, “150 hp / 240 Nm”).
• 🌐 Manufacturer's official website - in the model characteristics section.
• 📊 Dynamometer Test Charts - they are published by auto publications (for example, Behind the Wheel or Autobild) after test drives.
• 🔧 Sticker under the hood - on some cars (especially American) the moment is indicated next to the VIN code.

Example of a torque plot for BMW B58 (3.0 liters, turbo): torque of 500 Nm is available in the range of 1800–5000 rpm. This means that the engine pulls equally well at both low and high speeds - ideal for dynamic driving.

Make/Model	Engine	Power (hp)	Torque (Nm)	Max torque range (rpm)
Volkswagen Passat 2.0 TDI	Diesel, turbo	150	340	1750–3000
Toyota RAV4 2.5	Gasoline, atmospheric	203	243	4000–5000
Ford Mustang EcoBoost	Gasoline, turbo	310	475	2500–4500
Mercedes-Benz OM654	Diesel, turbo	194	400	1200–3200

Please note: diesel engines usually have more of a torque plateau (a wide range of speeds where the torque is close to maximum), while naturally aspirated petrol engines peak at high speeds.

What does engine torque depend on?

The moment is formed under the influence of several key factors:

1. Engine volume. The larger the volume, the more force the pistons can create. For example, V8 6.2 liters from Chevrolet produces 624 Nm, while 1.0 liter EcoBoost from Ford - only 170 Nm.
2. Turbocharging The turbine forces additional air into the cylinders, burning more fuel and increasing torque. For example, 1.5 TSI from Volkswagen thanks to the turbine, it develops 250 Nm - the same as atmospheric 2.5 liter motor.
3. Compression ratio. The higher the compression ratio, the more efficiently the fuel burns. Diesels have a compression ratio of 14:1–20:1 (versus 9:1–12:1 for gasoline engines), which provides them with high torque.
4. Design of the crankshaft and pistons. A long piston stroke (distance from top to bottom dead center) increases torque but reduces maximum rpm. For example, diesel engines usually have long-stroke pistons.
5. Gas distribution system. Technologies like VVT-i (y Toyota) or Valvetronic (y BMW) optimize cylinder filling, improving torque at low and medium speeds.

Interesting example: engine Mazda Skyactiv-X combines a high compression ratio (14:1) with turbocharging and a compression ignition system (like a diesel engine). The result is a torque of 224 Nm with a volume of only 2.0 liters, while the engine runs on gasoline!

Why do diesel engines pull better than gasoline ones?

Diesel engines have higher torque due to two key factors:

1. High compression ratio (16:1–20:1 versus 9:1–12:1 for gasoline) - this allows you to burn more fuel per cycle and get more energy.

2. Long piston stroke - increases the lever on which the piston presses, which directly affects the torque (remember: torque = force × lever).

In addition, diesel fuel has a higher energy content, and the absence of a throttle valve reduces intake losses.

⚠️ Attention: Installing a "sport" camshaft with wide timing can increase power at high speeds, but often reduces torque at the bottom. This makes the engine less suitable for everyday driving - you will have to constantly “turn” it to 4000–5000 rpm.

How to increase torque: tuning and modifications

If you are not satisfied with the “torque” of your car, there are several ways to increase the torque:

Install a turbocharger or replace the stock turbo with a more efficient one|Optimize the intake and exhaust systems (for example, install a 4-2-1 spider)|Flash the ECU for more aggressive ignition timing and fuel maps|Increase the compression ratio (for example, by boring the cylinder block)|Use high-octane fuel or additives to improve combustion-->

Let's look at each method in more detail:

• 🔥 Turbocharging The most effective way to increase torque. For example, atmospheric Honda K20 (2.0 l) produces 193 Nm, and its turbo version K20C1 — 400 Nm! Disadvantage: expensive and requires modification of other systems (cooling, fuel supply).
• 🔧 Chip tuning. Reflashing the ECU can add 10–20% of torque by optimizing ignition and injection. For example, after chipping Volkswagen 1.4 TSI the moment grows from 250 to 280 Nm. Risk: incorrect firmware reduces engine life.
• 🏁 Inlet/outlet. Replacing the air filter with a nulevik and installing a direct-flow exhaust can add 5–10 Nm. For example, on Subaru WRX Such modifications increase torque at low speeds.
• ⚡ Fuel. Switching from 92 to 98 gasoline or using octane correctors sometimes adds 3–5% of torque. Especially noticeable on turbo engines.

Case Study: Owners Nissan Skyline R34 with motor RB26DETT after installation of turbines Garrett GT28 and ECU firmware increases torque from 392 to 550 Nm - while power grows from 280 to 400+ hp.

⚠️ Attention: An increase in torque always leads to increased load on the transmission. For example, after tuning VAZ-2114 up to 200 Nm (from factory 128 Nm) the clutch or gearbox may not be able to withstand it. Before modifications, check the safety margin of the nodes!

Top 5 Torque Misconceptions

There are many myths surrounding the moment. Let's look at the most common ones:

1. “The greater the torque, the faster the car.” No! Torque affects acceleration, but top speed depends on power. For example, Tesla Model S Plaid has a torque of 1050 Nm, but its top speed is limited to 320 km/h - like many supercars with less torque.
2. “Diesels always have better torque.” Not always. Modern turbo-petrol engines (for example, Mercedes M256) are not inferior to diesel engines in terms of torque, and sometimes even surpass them. For example, BMW B58 (gasoline, 3.0 l) produces 500 Nm - the same as diesel OM642 (3.0 l).
3. “Torque on the wheels = torque of the engine.” No! The torque on the wheels depends on the gear ratios of the box and the main pair. For example, with an engine torque of 300 Nm and a gear ratio of 4.1 in first gear, the torque on the wheels will be 300 × 4.1 = 1230 Nm!
4. “Electric motors have no torque.” On the contrary! Electric motors produce maximum torque from 0 rpm. For example, Rimac Nevera has 2360 Nm - 5 times more than Bugatti Chiron!
5. "Torque is not important for city driving." This is not true. It is the moment that determines how quickly the car will react to pressing the gas pedal when overtaking or entering the highway. For example, Hyundai Solaris 1.6 (123 hp, 151 Nm) will lose in dynamics Kia Rio 1.4 T-GDI (100 hp, 172 Nm) due to the higher torque of the Korean.

FAQ: Frequently asked questions about torque

❓ Why do diesel engines have high torque but low maximum power?

Diesels are optimized for operation at low and medium speeds: they have a long piston stroke, a high compression ratio and no restrictions on detonation (like gasoline engines). This allows you to burn more fuel per cycle and obtain high torque. However, due to the heavy pistons and crankshaft, diesel engines cannot spin as fast as gasoline engines (usually up to 4500–5000 rpm versus 6000–8000 for gasoline), so their maximum power is lower.

❓ How does the moment affect fuel consumption?

The wider the rev range in which high torque is available, the less you need to change gears and rev the engine. This allows you to keep the speed at optimal speed and save fuel. For example, diesel BMW B47 (400 Nm at 1750–2500 rpm) consumes 20–30% less gasoline than a gasoline engine of similar power, because it does not need to maintain high speeds to maintain dynamics.

❓ Is it possible to increase torque without tuning?

Yes, there are several ways:

• Use high-octane fuel (for example, 98 instead of 92) - this allows the ECU to advance the ignition timing and increase torque slightly.
• Monitor the condition of the air filter - a clogged filter reduces torque by 5–10%.
• Use high-quality motor oil with low viscosity (for example, 0W-20 instead of 10W-40) - this reduces friction losses.
• Avoid overheating the engine - high temperatures reduce air density and impair cylinder filling.

These measures can add up to 5–7% torque without mechanical modifications.

❓ Why do the characteristics of electric vehicles indicate the moment at the wheels, and not at the engine?

In electric vehicles, wheel torque and engine torque are directly related (without a multi-stage gearbox), but manufacturers often indicate wheel torque because it more clearly demonstrates the dynamic capabilities of the car. For example, Tesla Model 3 Performance has an engine torque of ~500 Nm, but due to the gear ratio, the torque on the wheels reaches ~3000 Nm - this ensures lightning-fast acceleration.

❓ How is the moment related to gearbox ratios?

Gear ratios multiply the engine torque transmitted to the wheels. For example:

• On first gear (gear ratio 3.5–4.0) the torque increases by 3.5–4 times.
• On fifth gear (gear ratio 0.7–0.8) the torque is almost not multiplied, but the speed increases.

Therefore, cars with “short” gears (such as sports cars) accelerate better, but require shifts more often, while cars with “long” gears (such as trucks) may drive slower, but pull heavy loads without changing gears.