Science Facts

What Makes A Car Fast? – 10 Speed Facts

Car Speed

A big engine with a lightweight car can go so fast. And the faster you go, the more air friction will start to affect top speed. For this reason, the car that holds the fastest land speed record in the world 763.035 mph (1227.985 km/h). It looks like a jet because jets are perfect for minimizing drag from the air. But basically, for every pound added, either more power has to be coaxed from the engine, or a bigger engine has to be built.

The power-to-weight ratio is a delicate balance even for the muscliest of cars. It also takes a lot of effort to keep your car clean. Also, It bonds with and breaks apart carbon deposits more effectively than other additive technologies. Techron gets into the deepest parts of the engine, where the most destructive deposits built up and sweep them away. No matter how fast we can make cars go, though, there will always be speed limits holding us back.

What makes a car fast speed?

First of all, the major reason cars today can move so fast is because engines have gotten a lot more powerful in the last 130 years. The 1908 Ford Model T had only 22 horsepower and a top speed of 45 miles per hour (70 km/h). But a base Honda Accord can easily clear 100 mph (160kp/h) with almost 200 horsepower! Modern cars can pull more power from highly refined petroleum. Today’s more powerful cars can push more mass, more easily.

But it’s not that car engines have gotten more efficient. The Model T only got 3 miles per gallon less than the average car today! Only 14 to 30 percent of the power from gasoline combustion is used to pull the car forward. Most of the energy is lost to heat and friction.

Fuel quality

Car acceleration and top speed are two different terms, even if they depend on one another. One factor is fuel quality. For example, a gasoline engine running on 91-95 octane rating or 98-100 octane rating.

Diesel engines stand in the delay of the diesel field to out ignite. How fast does it ignite? A premium diesel fuel can upgrade the rating. Does it really help? It has a better throttle response, and acceleration will feel slightly better.

BMW M5 with more than 500 horsepower, and it will accelerate in around 4.4 seconds. It’s a lot faster, and it’s a lot safer compared to front-wheel drive. The Bugatti Chiron wouldn’t be that fast if it didn’t have an all-wheel drive.

Tires & Wheel size

One of the most common ways to improve handling acceleration top speed is to change the wheels. 16-inch wheels improve acceleration but decrease top speed. On the other hand, 17 inches to 19-inch wheels will improve top speed but decrease acceleration, and fuel consumption will increase. By using wider tires than the standard ones will improve the acceleration times and speed to corners. So cornering will be enhanced.


The fastest transmissions are the DCT, or dual-clutch transmissions, currently being used even in the Bugatti Chiron, Lamborghini, Ferraris, BMW series, Audi RS, and the list goes on. A dual-clutch transmission is made out of two manual transmissions. It’s automated. So at the core of the fastest transmission is the manual transmission.

Fo fast, automatic transmission that DCT is a way to go. Comported automatics are comfortable, but they aren’t too fast, like slow shifts and acceleration shocks. CVTs aren’t that bad either, but the DCT is still faster. Each transmission from each manufacturer is different. So different efficiency losses from the transmission to transmission and the lower, the better.

Gear ratio & Drive ratio

The gear ratio is a significant fact that identifies the car speed.

  • Lower gear ratio, higher top speed, slower acceleration.
  • Higher gear ratio, faster acceleration, lower top speed.

Each car has a different final drive ratio which is given by the differential generally.

  • The 3.3 drive ratio will increase top speed and reduce acceleration time.
  • The 3.6 final drive ratio increases acceleration time and decreases top speed.

Most of the time, people who upgrade to a limited differential want to drive their car. To do with your car, you need more power and more torque to wheels. For every 50 kilograms, the driver will have a different acceleration. So, the most important of all power and torque. A bigger engine with higher power output and torque output will have faster acceleration. A stage one, for example, will give you from 30-50 horsepower and from 50 to 80 Newton meters of torque. So more powerful, more torque.

Car weight

Weight is super essential for handling acceleration and top speed. Basically, in the automotive industry, a lighter car is expensive. For example, an Audi q7 has 245 horsepower and 550 meters of torque, accelerates from 0 to 100 km/h in 8.2 seconds. That’s because it has 2,500 kilograms or 2.5 tons. And every TT has a 2-liter turbocharged gasoline engine with 200 fourth power, 280 Newton meters of torque.

  • So, two times less the torque and two times less the weight.

It accelerates in six-point six seconds. It’s a lot faster, but it’s a lot lighter even if it has low power and torque outputs. So, to give cars more horsepower, engineers have either added more engines, or reduced weight, or both. It all comes down to the Power Weight ratio. That super-fast Bugatti Chiron has 1,500 horsepower but needs TWO V8 engines to get that. That’s a lot of weight.

So, to make the car go fast, they needed to make it lighter. The power to weight ratio is a simple formula to divide Weight by Power. While the new car does have more power in a heavier vehicle, it is a balance. If engineers can get a low weight-to-power ratio, they’ll have a faster car. But to make a car with a heavy engine have less weight ain’t easy.

Ford mixed the steel on Model Ts with the element Vanadium to try and make it lighter. Engineers still do stuff like that today. The Prius uses aluminum, plastics, and special high-tensile, high-strength steels. The Chiron, however, was built with ultra-lightweight materials like titanium and carbon fiber, keeping the weight down even further and making for an even lower ratio! Of course, the Chiron is 100 times more expensive than a Prius, partly due to that lightweight material, so there’s that.

Aerodynamics design

Aerodynamics plays an essential part in the design process of both passenger automobiles traveling on roads. The race cars are speeding down the racetrack cruising down the street at low speeds. The surrounding air interacts with the car. However, at higher speeds, you will understand how air resistance and the car’s design are closely connected to performance.

On the wind, noise and mileage also affect how potential buyers perceive the car. A more aerodynamic vehicle engine doesn’t have to work as hard to push the car through the air wall as the engine of a vehicle with poor aerodynamics. Aerodynamics can be separated into two separate forces drag and lift.

Designers limit air resistance, also known as drag, in a variety of ways. They might limit the air resistance with enclosed underbodies flush headlights rounded shapes on the exterior. That channel the airflow around the car or by using a spoiler to decrease lift and keep the air from lifting the car’s wheels. Automotive engineers and designers quantify aerodynamics through a number known as the drag coefficient.

  • The lower the drag coefficient, the better a car’s aerodynamic performance.

The drag coefficient is derived by measuring the effective air density airspeed drag. And the surface area exposed to these forces the frontal area. The higher the drag coefficient, the less aerodynamic the object.

Today the average modern automobile achieves a drag coefficient of between 0.25 and 0.35. By using this design, automakers do often break from the trend of using the raindrop shape. It will be interesting to see how car designers innovate and push automotive shapes forward to create unique designs.

Top 10 ways to make car go faster

Here are the top 10 tips to speed up your car.

1. Reduce a vehicle weight. The lighter the vehicle, the faster the vehicle start. Remove unnecessary weight such as spare tire, rack seat, panels, glove box, center console, etc.

2. Use quality gasoline. Don’t be one of those guys using cheap gasoline.

3. Cold air intake is the easiest way to increase horsepower. It is the easiest and an expensive way to increase horsepower.

4. Brand new spark plugs will ignite fuel faster and more efficiently.

5. Use an aftermarket high-performance exhaust. It will improve performance. The engine will exhale better.

6. Install nitrous oxide to increase major horsepower. However, this is only a temporary solution, and expect to blow up the engine and piston ring if you overdo it.

7. A turbocharger is the best way to increase power. The exhaust drives the turbocharger, and all that exhaust is being wasted. Why not use its exhaust and drive the turbocharger to increase power?

8. Use performance tire and preferably Z rated better tires better traction, therefore, gripping the road better.

9. Lightweight rims will make a huge difference. So get rid of stock tires and use better lightweight rims: the lighter, the better, and the less weight to haul around.

10. Replace strut in springs with performance parts. Stiffer suspensions components and lowering the car will also lower the center of gravity, therefore, improving handling.

If you want more power and more torque without changing the car or making too many changes to the engine, you should add stage one. And these are the main factors which make a car fast. It’s almost impossible to have all of them. Sports cars have most of these characteristics. I would honestly prefer a light car with 200 horsepower with drive in a manual transmission.

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